The official religion of Pakistan is Islam, as enshrined by Article 2 of the Constitution, and is practised by an overwhelming majority of 96.35% of the country's population. The remaining 3.65% practice Hinduism, Christianity, Ahmadiyya (considered a non-Muslim group as per Pakistani constitution), Sikhism, Zoroastrianism and other religions.

A few aspects of secularism have also been adopted by Pakistani constitution from British colonial concept. However, religious minorities in Pakistan often face significant discrimination, subject to issues such as violence and the blasphemy laws.

Muslims comprise a number of sects: the majority practice Sunni Islam (estimated at 90%), while a minority practice Shia Islam (estimated at 10%). Most Pakistani Sunni Muslims belong to the Hanafi school of jurisprudence, which is represented by the Barelvi and Deobandi traditions. However, the Hanbali school is also gaining popularity due to Ahl-i Hadith and Wahhabi influence from the Middle East. The majority of Pakistani Shia Muslims belong to the Twelver Islamic law school, with significant minority groups who practice Ismailism, which is composed of Nizari (Aga Khanis), Mustaali, Dawoodi Bohra, Sulaymani, and others.

Before the arrival of Islam beginning in the 8th century, the region comprising Pakistan was home to a diverse plethora of faiths, including Hinduism, Buddhism, Jainism and Zoroastrianism.

Khawaja Nazimuddin, Pakistan's second Prime Minister, argued against equal rights for all citizens in an Islamic state. However, The Constitution of Pakistan establishes Islam as the state religion, and provides that all citizens have the right to profess, practice and propagate their religion subject to law, public order, and morality. The Constitution also states that all laws are to conform with the injunctions of Islam as laid down in the Quran and Sunnah.

The Constitution limits the political rights of Pakistan's non-Muslims. Only Muslims are allowed to become the President or the Prime Minister. Only Muslims are allowed to serve as judges in the Federal Shariat Court, which has the power to strike down any law deemed un-Islamic, though its judgments can be overruled by the Supreme Court of Pakistan. However, non-Muslims have served as judges in the High Courts and Supreme Court. In 2019, Naveed Amir, a Christian member of the National Assembly moved a bill to amend the article 41 and 91 of the Constitution which would allow non-Muslims to become Prime Minister and President of Pakistan. However, Pakistan's parliament blocked the bill.

There was a petition in Supreme Court of Pakistan in the year of 2015 by 17 judges to declare the nation as a "Secular state" officially. Muhammad Ali Jinnah (the founder of Pakistan) wanted Pakistan to be a secular, democratic, and a liberal republic. Its predecessor, the Dominion of Pakistan, was secular from 1947 to 1955 and after that, Pakistan adopted a constitution in 1956, becoming an Islamic republic with Islam as its state religion.

The main principles of Secularism in the Pakistani constitution were incorporated in its fundamental rights which were granted under various articles of 20, 21, 22, 25, 26, 27, 36 & 38 of the constitution –

(a) Article 20 : Freedom to profess religion and to manage religious institutions.

(b) Article 21 : Safeguard against taxation for purposes of any particular religion.

(c) Article 22 : Safeguards as to educational institutions in respect of religion, etc.

(d) Article 25 : Equality of citizens.

(e) Article 26 : Non-discrimination in respect of access to public places.

(f) Article 27 : Safeguard against discrimination in services.

(g) Article 36 : Protection of Minorities.

(h) Article 38 : Promotion of social and economic well-being of all the people.

The 1961 Census of Pakistan (Volume 1 – page 24 of Part II – Statement 2.19) released estimates on the religious composition of the country to the nearest thousandth for Muslims, Hindus, Christians, and others for 60 years prior. The pre-partition figures were derived from prior decadal censuses taken in administrative divisions in British India that would become part of Pakistan following partition, and included separate results for West Pakistan and East Pakistan. As the area that composes the contemporary nation of Pakistan corresponds with the historical administrative unit of West Pakistan, the figures in the table below are for West Pakistan from the 1901 census, 1911 census, 1921 census, and the 1931 census.

Religion in Pakistan (1901–1931)

Religious group	1901		1911		1921		1931
	Pop.	%	Pop.	%	Pop.	%	Pop.	%
Islam	10,957,000	80.39%	13,077,000	81.25%	13,554,000	79.53%	16,533,000	77.56%
Hinduism	2,327,000	17.07%	2,267,000	14.09%	2,523,000	14.8%	3,115,000	14.61%
Christianity	31,000	0.23%	119,000	0.74%	214,000	1.26%	357,000	1.67%
Others	314,000	2.3%	631,000	3.92%	751,000	4.41%	1,312,000	6.15%
Total Responses	13,630,000	82.22%	16,094,000	83.04%	17,042,000	80.74%	21,317,000	90.55%
Total Population	16,577,000	100%	19,381,000	100%	21,108,000	100%	23,541,000	100%

The total population of the region that composes contemporary Pakistan was approximately 24,774,056 according to the 1931 census. With the exception of the Federally Administered Tribal Areas, all administrative divisions in the region that composes contemporary Pakistan collected religious data, with a combined total population of 22,514,768, for an overall response rate of 90.9 percent. Similar to the contemporary era, where censuses do not collect religious data in Azad Jammu and Kashmir and Gilgit–Baltistan, the total number of responses for religion is slightly smaller than the total population, as detailed in the table breakdown below.

Religious groups in Pakistan (1931)

Religious group	Pakistan		Punjab		Sindh		Khyber Pakhtunkhwa		Balochistan		AJK		Gilgit– Baltistan
	Total Population	Percentage	Pop.	%	Pop.	%	Pop.	%	Pop.	%	Pop.	%	Pop.	%
Islam	17,557,877	77.98%	10,570,029	75.28%	3,017,377	73.34%	2,227,303	91.84%	798,093	91.88%	850,135	87.68%	94,940	98.44%
Hinduism	3,298,570	14.65%	1,957,878	13.94%	1,055,119	25.65%	142,977	5.9%	53,681	6.18%	87,554	9.03%	1,361	1.41%
Sikhism	1,282,698	5.7%	1,180,789	8.41%	19,172	0.47%	42,510	1.75%	8,425	0.97%	31,709	3.27%	93	0.1%
Christianity	360,371	1.6%	324,730	2.31%	15,152	0.37%	12,213	0.5%	8,059	0.93%	168	0.02%	49	0.05%
Jainism	8,096	0.04%	6,921	0.05%	1,144	0.03%	0	0%	17	0%	11	0%	3	0%
Zoroastrianism	4,178	0.02%	413	0%	3,537	0.09%	60	0%	167	0.02%	1	0%	0	0%
Judaism	1,019	0.005%	6	0%	985	0.02%	11	0%	17	0%	—	—	—	—
Tribal	236	0.001%	—	—	204	0%	—	—	32	0%	0	0%	0	0%
Buddhism	155	0.001%	32	0%	53	0%	2	0%	68	0.01%	0	0%	0	0%
Others	1,553	0.01%	0	0%	1,510	0.04%	0	0%	43	0%	0	0%	0	0%
Total responses	22,514,768	90.88%	14,040,798	100%	4,114,253	100%	2,425,076	51.77%	868,617	100%	969,578	100%	96,446	100%
Total population	24,774,056	100%	14,040,798	100%	4,114,253	100%	4,684,364	100%	868,617	100%	969,578	100%	96,446	100%

The total population of the region that composes contemporary Pakistan was approximately 29,643,600 according to the final census prior to partition in 1941. With the exception of the Federally Administered Tribal Areas, all administrative divisions in the region that composes contemporary Pakistan collected religious data, with a combined total population of 27,266,001, for an overall response rate of 92.0 percent. Similar to the contemporary era, where censuses do not collect religious data in Azad Jammu and Kashmir and Gilgit–Baltistan, the total number of responses for religion is slightly smaller than the total population, as detailed in the table breakdown below.

Religious groups in Pakistan (1941)

Religious group	Pakistan		Punjab		Sindh		Khyber Pakhtunkhwa		Balochistan		AJK		Gilgit– Baltistan
	Total Population	Percentage	Pop.	%	Pop.	%	Pop.	%	Pop.	%	Pop.	%	Pop.	%
Islam	21,113,214	77.43%	13,022,160	75.06%	3,462,015	71.52%	2,788,797	91.8%	785,181	91.53%	939,460	87.54%	115,601	99.62%
Hinduism	3,981,565	14.6%	2,373,466	13.68%	1,279,530	26.43%	180,321	5.94%	54,394	6.34%	93,559	8.72%	295	0.25%
Sikhism	1,672,753	6.13%	1,530,112	8.82%	32,627	0.67%	57,939	1.91%	12,044	1.4%	39,910	3.72%	121	0.1%
Christianity	432,724	1.59%	395,311	2.28%	20,304	0.42%	10,889	0.36%	6,056	0.71%	136	0.01%	28	0.02%
Tribal	37,603	0.14%	—	—	37,598	0.78%	—	—	3	0%	0	0%	2	0%
Jainism	13,215	0.05%	9,520	0.05%	3,687	0.08%	1	0%	7	0%	0	0%	0	0%
Zoroastrianism	4,253	0.02%	312	0%	3,841	0.08%	24	0%	76	0.01%	0	0%	0	0%
Judaism	1,180	0.004%	7	0%	1,082	0.02%	71	0%	20	0%	0	0%	0	0%
Buddhism	266	0.001%	87	0%	111	0%	25	0%	43	0.01%	0	0%	0	0%
Others	19,228	0.07%	19,128	0.11%	0	0%	0	0%	11	0%	89	0.01%	0	0%
Total responses	27,266,001	91.98%	17,340,103	100%	4,840,795	100%	3,038,067	56.1%	857,835	100%	1,073,154	100%	116,047	100%
Total population	29,643,600	100%	17,340,103	100%	4,840,795	100%	5,415,666	100%	857,835	100%	1,073,154	100%	116,047	100%

After partition, when first census of Pakistan was conducted in the year 1951, It was found that the Muslim proportion in West Pakistan (contemporary Pakistan) increased from approximately 77.3 percent according to the 1941 census, to 97.1 percent as per the 1951 census; in contrast, the combined Hindu and Sikh proportion in West Pakistan (contemporary Pakistan) decreased from approximately 20.8 percent to just 1.7 percent during the same timeframe, as the 1947 Partition of India gave rise to bloody rioting and indiscriminate inter-communal killing of Hindus, Muslims, and Sikhs across the Indian subcontinent, especially in Punjab region. As a result, around 7.3 million Hindus and Sikhs moved to India and 7.2 million Muslims moved to Pakistan permanently, leading to demographic change of both the nations to a certain extent.

Pakistan Religious diversity as per (2017 census)

Religion	Population	%
Muslims ()	200,352,754	96.47%
Hindus ()	4,444,437	2.14%
Christians ()	2,637,586	1.27%
Ahmadiyya Muslims	207,688	0.09%
Others (inc. Sikhs, Zoroastrians, Baháʼís, Kalashas, Buddhists, Irreligious)	20,767	0.01%
Total	207,684,000	100%

As per 2017 Census of Pakistan, the country has a population of 207,684,000.The CCI approved the release of provisional population figures of 207.754 million people. The final results showed the total population of Pakistan to be 207.684 million, a reduction of 68,738 people or 0.033% against provisional results, Pakistan has a population of 224,418,238 as of 2021.

As of 2018, there are 3.63 million non-Muslim voters in Pakistan- 1.77 million were Hindus, 1.64 million Christians, 167,505 were Ahmadi Muslims, 31,543 were Baháʼís, 8,852 were Sikhs, 4,020 were Parsis, 1,884 were Buddhist and others such as Kalashas. The NADRA makes it nearly impossible to declare and change the religion to anything from Islam making the statistics somewhat misleading.

Pakistan Bureau of Statistics released religious data of Pakistan Census 2017 on 19 May 2021. 96.47% are Muslims, followed by 2.14% Hindus, 1.27% Christians, 0.09% Ahmadi Muslims and 0.02% others.

These are some maps of religious minority groups. The 2017 census showed an increasing share in Hinduism, mainly caused by a higher birth rate among the impoverished Hindus of Sindh province. This census also recorded Pakistan's first Hindu-majority district, called Umerkot District, where Muslims were previously the majority.

On the other hand, Christianity in Pakistan, while increasing in raw numbers, has fallen significantly in percentage terms since the last census. This is due to Pakistani Christians having a significantly lower fertility rate than Pakistani Muslims and Pakistani Hindus as well as them being concentrated in the most developed parts of Pakistan, Lahore District (over 5% Christian), Islamabad Capital Territory (over 4% Christian), and Northern Punjab.

The Ahmadiyya movement shrunk in size (both raw numbers and percentage) between 1998 and 2017, while remaining concentrated in Lalian Tehsil, Chiniot District, where approximately 13% of the population is Ahmadi Muslim.

Here are some maps of Pakistan's religious minority groups as of the 2017 census by district:

• 
  Hindu proportion of each Pakistani District of each Pakistani District as of the 2017 Pakistan Census
• 
  Christian proportion of each Pakistani District of each Pakistani District as of the 2017 Pakistan Census
• 
  Ahmadiyya Muslim proportion of each Pakistani District of each Pakistani District as of the 2017 Pakistan Census

Pakistan religious diversity as per 2023 census

Religion	Population	%
Muslims ()	231,686,709	96.35%
Hindus ()	5,217,216	2.17%
Christians ()	3,300,788	1.37%
Ahmadiyya Muslims	162,684	0.07%
Sikhs	15,992	0.01%
Zoroastrians	2,348	<0.01%
Others (inc. Kalashas,Baháʼís, Buddhists)	72,346	0.03%
Total	240,458,089	100%

Religion in Punjab, Pakistan (1881–1931)

Religious group	1881		1901		1911		1921		1931
	Pop.	%	Pop.	%	Pop.	%	Pop.	%	Pop.	%
Islam	6,201,859	78.09%	7,951,155	76.25%	8,494,314	76.49%	8,975,288	75.49%	10,570,029	75.28%
Hinduism	1,449,913	18.26%	1,944,363	18.65%	1,645,758	14.82%	1,797,141	15.12%	1,957,878	13.94%
Sikhism	272,908	3.44%	483,999	4.64%	813,441	7.33%	863,091	7.26%	1,180,789	8.41%
Christianity	12,992	0.16%	42,371	0.41%	144,514	1.3%	247,030	2.08%	324,730	2.31%
Jainism	4,352	0.05%	5,562	0.05%	5,977	0.05%	5,930	0.05%	6,921	0.05%
Zoroastrianism	354	0.004%	300	0.003%	377	0.003%	309	0.003%	413	0.003%
Buddhism	0	0%	6	0.0001%	168	0.002%	172	0.001%	32	0.0002%
Judaism	—	—	9	0.0001%	36	0.0003%	16	0.0001%	6	0%
Others	21	0.0003%	0	0%	0	0%	8	0.0001%	0	0%
Total Population	7,942,399	100%	10,427,765	100%	11,104,585	100%	11,888,985	100%	14,040,798	100%

Religion in Punjab, Pakistan (1941–2023)

Religious group	1941		1951		1998		2017		2023
	Pop.	%	Pop.	%	Pop.	%	Pop.	%	Pop.	%
Islam	13,022,160	75.06%	20,200,794	97.89%	71,574,830	97.22%	107,541,602	97.77%	124,462,897	97.75%
Hinduism	2,373,466	13.68%	33,052	0.16%	116,410	0.16%	211,641	0.19%	249,716	0.2%
Sikhism	1,530,112	8.82%	—	—	—	—	—	—	5,649	0.004%
Christianity	395,311	2.28%	402,617	1.95%	1,699,843	2.31%	2,063,063	1.88%	2,458,924	1.93%
Jainism	9,520	0.05%	—	—	—	—	—	—	—	—
Zoroastrianism	312	0.002%	195	0.001%	—	—	—	—	358	0.0003%
Buddhism	87	0.001%	9	0%	—	—	—	—	—	—
Judaism	7	0%	—	—	—	—	—	—	—	—
Ahmadiyya	—	—	—	—	181,428	0.25%	158,021	0.14%	140,512	0.11%
Others	19,534	0.11%	35	0%	48,779	0.07%	15,328	0.01%	15,249	0.01%
Total Population	17,350,103	100%	20,636,702	100%	73,621,290	100%	109,989,655	100%	127,333,305	100%

Religion in Sindh (1901−1931)

Religious group	1901		1911		1921		1931
	Pop.	%	Pop.	%	Pop.	%	Pop.	%
Islam	2,609,337	76.52%	2,822,756	75.53%	2,562,700	73.8%	3,017,377	73.34%
Hinduism	787,683	23.1%	877,313	23.47%	876,629	25.24%	1,055,119	25.65%
Christianity	7,825	0.23%	10,917	0.29%	11,734	0.34%	15,152	0.37%
Zoroastrianism	2,000	0.06%	2,411	0.06%	2,913	0.08%	3,537	0.09%
Jainism	921	0.03%	1,349	0.04%	1,534	0.04%	1,144	0.03%
Judaism	428	0.01%	595	0.02%	671	0.02%	985	0.02%
Buddhism	0	0%	21	0.001%	41	0.001%	53	0.001%
Sikhism	—	—	12,339	0.33%	8,036	0.23%	19,172	0.47%
Tribal	—	—	9,224	0.25%	8,186	0.24%	204	0%
Others	2,029	0.06%	298	0.01%	64	0.002%	1,510	0.04%
Total Population	3,410,223	100%	3,737,223	100%	3,472,508	100%	4,114,253	100%

Religion in Sindh (1941−2023)

Religious group	1941		1951		1998		2017		2023
	Pop.	%	Pop.	%	Pop.	%	Pop.	%	Pop.	%
Islam	3,462,015	71.52%	5,535,645	91.53%	27,796,814	91.32%	43,234,107	90.34%	50,126,428	90.09%
Hinduism	1,279,530	26.43%	482,560	7.98%	2,280,842	7.49%	4,176,986	8.73%	4,901,407	8.81%
Tribal	37,598	0.78%	—	—	—	—	—	—	—	—
Sikhism	32,627	0.67%	—	—	—	—	—	—	5,182	0.01%
Christianity	20,304	0.42%	22,601	0.37%	294,885	0.97%	408,301	0.85%	546,968	0.98%
Zoroastrianism	3,841	0.08%	5,046	0.08%	—	—	—	—	1,763	0.003%
Jainism	3,687	0.08%	—	—	—	—	—	—	—	—
Judaism	1,082	0.02%	—	—	—	—	—	—	—	—
Buddhism	111	0.002%	670	0.01%	—	—	—	—	—	—
Ahmadiyya	—	—	—	—	43,524	0.14%	21,661	0.05%	18,266	0.03%
Others	0	0%	1,226	0.02%	23,828	0.08%	13,455	0.03%	38,395	0.07%
Total Population	4,840,795	100%	6,047,748	100%	30,439,893	100%	47,854,510	100%	55,638,409	100%

Religion in Khyber Pakhtunkhwa (1881–1931)

Religious group	1881		1891		1901		1911		1921		1931
	Pop.	%	Pop.	%	Pop.	%	Pop.	%	Pop.	%	Pop.	%
Islam	1,787,341	91.4%	2,088,015	91.51%	1,890,479	92.19%	2,039,994	92.86%	2,062,786	91.62%	2,227,303	91.84%
Hinduism	154,081	7.88%	166,984	7.32%	129,306	6.31%	119,942	5.46%	149,881	6.66%	142,977	5.9%
Sikhism	9,205	0.47%	21,110	0.93%	25,733	1.25%	30,345	1.38%	28,040	1.25%	42,510	1.75%
Christianity	4,725	0.24%	5,437	0.24%	5,119	0.25%	6,585	0.3%	10,610	0.47%	12,213	0.5%
Jainism	106	0.01%	108	0.005%	37	0.002%	4	0.0002%	3	0.0001%	0	0%
Zoroastrianism	52	0.003%	48	0.002%	46	0.002%	49	0.002%	20	0.001%	60	0.002%
Buddhism	0	0%	0	0%	0	0%	0	0%	0	0%	2	0.0001%
Judaism	—	—	4	0.0002%	4	0.0002%	14	0.001%	0	0%	11	0.0005%
Others	5	0.0003%	2	0.0001%	0	0%	0	0%	0	0%	0	0%
Total Responses	1,955,515	100%	2,281,708	100%	2,050,724	96.48%	2,196,933	57.53%	2,251,340	44.35%	2,425,076	51.77%
Total Population	1,955,515	100%	2,281,708	100%	2,125,480	100%	3,819,027	100%	5,076,476	100%	4,684,364	100%
Note: Pre-partition populations for religious data is for North-West Frontier Province only and excludes the Federally Administered Tribal Areas (both administrative divisions later merged to form Khyber Pakhtunkhwa in 2018), as religious data was not collected in the latter region at the time.

Religion in Khyber Pakhtunkhwa (1941–2023)

Religious group	1941		1951		1998		2017		2023
	Pop.	%	Pop.	%	Pop.	%	Pop.	%	Pop.	%
Islam	2,788,797	91.8%	5,858,080	99.89%	20,808,480	99.47%	35,428,857	99.79%	40,486,153	99.62%
Hinduism	180,321	5.94%	2,432	0.04%	7,011	0.03%	6,373	0.02%	6,102	0.02%
Sikhism	57,939	1.91%	—	—	—	—	—	—	4,050	0.01%
Christianity	10,889	0.36%	3,823	0.07%	38,974	0.19%	50,018	0.14%	134,884	0.33%
Judaism	71	0.002%	—	—	—	—	—	—	—	—
Buddhism	25	0.001%	—	—	—	—	—	—	—	—
Zoroastrianism	24	0.001%	—	—	—	—	—	—	36	0.0001%
Jainism	1	0%	—	—	—	—	—	—	—	—
Ahmadiyya	—	—	—	—	48,703	0.23%	7,204	0.02%	951	0.002%
Others	0	0%	215	0.004%	16,808	0.08%	9,512	0.03%	8,944	0.02%
Total Responses	3,038,067	56.1%	5,864,550	100%	20,919,976	100%	35,501,964	100%	40,641,120	99.47%
Total Population	5,415,666	100%	5,864,550	100%	20,919,976	100%	35,501,964	100%	40,856,097	100%
Note1: Pre-partition populations for religious data is for North-West Frontier Province only and excludes the Federally Administered Tribal Areas (both administrative divisions later merged to form Khyber Pakhtunkhwa in 2018), as religious data was not collected in the latter region at the time. Note2: 1951, 1998, and 2017 populations for religious data combine the North-West Frontier Province and Federally Administered Tribal Areas, both administrative divisions which later merged to form Khyber Pakhtunkhwa in 2018.

Religion in Balochistan (1901–2017)

Religious group	1901		1911		1921		1931		1941		1951		1998		2017		2023
	Pop.	%	Pop.	%	Pop.	%	Pop.	%	Pop.	%	Pop.	%	Pop.	%	Pop.	%	Pop.	%
Islam	765,368	94.4%	782,648	93.76%	733,477	91.73%	798,093	91.88%	785,181	91.53%	1,137,063	98.52%	6,484,006	98.75%	12,255,528	99.28%	14,429,568	99.09%
Hinduism	38,158	4.71%	38,326	4.59%	51,348	6.42%	53,681	6.18%	54,394	6.34%	13,087	1.13%	39,146	0.6%	49,378	0.4%	59,107	0.41%
Sikhism	2,972	0.37%	8,390	1.01%	7,741	0.97%	8,425	0.97%	12,044	1.4%	—	—	—	—	—	—	1,057	0.007%
Christianity	4,026	0.5%	5,085	0.61%	6,693	0.84%	8,059	0.93%	6,056	0.71%	3,937	0.34%	26,462	0.4%	33,330	0.27%	62,731	0.43%
Zoroastrianism	166	0.02%	170	0.02%	165	0.02%	167	0.02%	76	0.01%	79	0.01%	—	—	—	—	181	0%
Judaism	48	0.01%	57	0.01%	19	0.002%	17	0.002%	20	0.002%	—	—	—	—	—	—	—	—
Jainism	8	0.001%	10	0.001%	17	0.002%	17	0.002%	7	0.001%	—	—	—	—	—	—	—	—
Buddhism	0	0%	16	0.002%	160	0.02%	68	0.01%	43	0.01%	1	0%	—	—	—	—	—	—
Ahmadiyya	—	—	—	—	—	—	—	—	—	—	—	—	9,800	0.15%	2,469	0.02%	557	0.004%
Others	0	0%	1	0%	5	0.001%	75	0.009%	14	0.002%	0	0%	6,471	0.1%	3,703	0.03%	8,810	0.06%
Total Population	810,746	100%	834,703	100%	799,625	100%	868,617	100%	857,835	100%	1,154,167	100%	6,565,885	100%	12,344,408	100%	14,562,011	100%

Religious groups in Azad Jammu and Kashmir (1901–1941)

Religious group	1901		1911		1921		1931		1941
	Pop.	%	Pop.	%	Pop.	%	Pop.	%	Pop.	%
Islam	747,426	85.62%	749,945	87.76%	780,607	88.02%	850,135	87.68%	939,460	87.54%
Hinduism	108,331	12.41%	84,130	9.85%	81,733	9.22%	87,554	9.03%	93,559	8.72%
Sikhism	17,132	1.96%	20,391	2.39%	24,491	2.76%	31,709	3.27%	39,910	3.72%
Christianity	18	0%	55	0.01%	24	0%	168	0.02%	136	0.01%
Jainism	0	0%	8	0%	6	0%	11	0%	0	0%
Buddhism	0	0%	2	0%	0	0%	0	0%	0	0%
Zoroastrianism	0	0%	0	0%	0	0%	1	0%	0	0%
Tribal	—	—	—	—	—	—	0	0%	0	0%
Judaism	—	—	—	—	—	—	—	—	0	0%
Others	8	0%	0	0%	0	0%	0	0%	89	0.01%
Total population	872,915	100%	854,531	100%	886,861	100%	969,578	100%	1,073,154	100%

Religious groups in Gilgit–Baltistan (1901–1941)

Religious group	1901		1911		1921		1931		1941
	Pop.	%	Pop.	%	Pop.	%	Pop.	%	Pop.	%
Islam	58,779	96.54%	77,189	98.45%	88,643	98.82%	94,940	98.44%	115,601	99.62%
Hinduism	2,001	3.29%	1,112	1.42%	948	1.06%	1,361	1.41%	295	0.25%
Sikhism	74	0.12%	81	0.1%	90	0.1%	93	0.1%	121	0.1%
Christianity	28	0.05%	22	0.03%	16	0.02%	49	0.05%	28	0.02%
Jainism	1	0%	0	0%	0	0%	3	0%	0	0%
Buddhism	0	0%	0	0%	0	0%	0	0%	0	0%
Zoroastrianism	0	0%	0	0%	0	0%	0	0%	0	0%
Tribal	—	—	—	—	—	—	0	0%	2	0%
Judaism	—	—	—	—	—	—	—	—	0	0%
Others	2	0%	0	0%	0	0%	0	0%	0	0%
Total population	60,885	100%	78,404	100%	89,697	100%	96,446	100%	116,047	100%

Islam is the state religion of Pakistan, and about 96–98% of Pakistanis are Muslim. Pakistan has the second largest number of Muslims in the world after Indonesia. The majority are Sunni (estimated at 85-90%), with an estimated 10–15% Shia. A PEW survey in 2012 found that 6% of Pakistani Muslims were Shia. There are a number of Islamic law schools called Madhab (schools of jurisprudence), which are called fiqh or 'Maktab-e-Fikr' in Urdu. Nearly all Pakistani Sunni Muslims belong to the Hanafi Islamic school of thought, while a small number belong to the Hanbali school. The majority of Pakistani Shia Muslims belong to the Twelver (Ithna Asharia) branch, with significant minority who adhere to Ismailism branch that is composed of Nizari (Aga Khanis), Mustaali, Dawoodi Bohra, Sulaymani, and others. Sufis and above mentioned Sunni and Shia sects are considered to be Muslims according to the Constitution of Pakistan; the Ahmadiyya (though self-described Muslims) are specifically declared not to be.

The mosque is an important religious as well as social institution in Pakistan. Many rituals and ceremonies are celebrated according to Islamic calendar.

There are two major Sunni sects in Pakistan, the Barelvi movement and Deobandi movement. Statistics regarding Pakistan's sects and sub-sects have been called "tenuous", but estimates of the sizes of the two groups give a slight majority of Pakistan's population to followers of the Barelvi school, while 15–25% are thought to follow the Deobandi school of jurisprudence.

Islam to some extent syncretized with pre-Islamic influences, resulting in a religion with some traditions distinct from those of the Arab world. Two Sufis whose shrines receive much national attention are Ali Hajweri in Lahore (ca. 11th century) and Shahbaz Qalander in Sehwan, Sindh (ca. 12th century). Sufism, a mystical Islamic tradition, promoted by Fariduddin Ganjshakar in Pakpatan, has a long history and a large popular following in Pakistan. Popular Sufi culture is centered on Thursday night gatherings at shrines and annual festivals which feature Sufi music and dance. Contemporary Islamic fundamentalists criticize its popular character, which in their view, does not accurately reflect the teachings and practice of the Islamic prophet Muhammad and his companions. There have been terrorist attacks directed at Sufi shrines and festivals, 5 in 2010 that killed 64 people.

According to the last Census in Pakistan, Ahmadi Muslim made up 0.07% of the population; however, the Ahmadiyya Muslim community boycotted the census. Independent groups generally estimate the population to be somewhere between two and five million Ahmadi Muslims. In media reports, four million is the most commonly cited figure.

In 1974, the government of Pakistan amended the Constitution of Pakistan to define a Muslim according to Qu'ran 33:40, as a person who believes in finality of Muhammad under the Ordinance XX. According to Ordinance XX, Ahmadi Muslims cannot call themselves Muslim or "pose as Muslims" which is punishable by three years in prison. Ahmadi Muslims believe in Muhammad as the final law-bearing prophet, but also believe Mirza Ghulam Ahmad to be a prophet, the prophecised Mehdi and second coming of Jesus. Consequently, Ahmadi Muslims were declared non-Muslims by a parliamentary tribunal and are subject to persecution under Pakistani blasphemy laws.

Hinduism is the second largest religion affiliation in Pakistan after Islam. As of 2020, Pakistan has the fourth largest Hindu population in the world after India, Nepal and Bangladesh. According to the 1998 Census, the Hindu population was found to be 2,111,271 (including 332,343 scheduled castes Hindus). While according to latest census of 2017, There are 4.4 million Hindus in Pakistan out of 207.68 million total population comprising 2.14% of the country's population of both General and Schedule caste. Hindus are found in all provinces of Pakistan but are mostly concentrated in Sindh. About 93% of Hindus live in Sindh, 5% in Punjab and nearly 2% in Balochistan. They speak a variety of languages such as Sindhi, Seraiki, Aer, Dhatki, Gera, Goaria, Gurgula, Jandavra, Kabutra, Koli, Loarki, Marwari, Sansi, Vaghri and Gujarati.

The Rig Veda, the oldest Hindu text, is believed to have been composed in the Punjab region in the Indian subcontinent around 1500 BCE and spread from there across South and South East Asia slowly developing and evolving into the various forms of the faith we see today.

Many ancient Hindu temples are located throughout Pakistan. A significant Hindu pilgrimage site known as Hinglaj Mata takes place in southern Balochistan, where over 250,000 people visit during spring as a pilgrimage.

Cases collected by Global Human Rights Defence show that underage Hindu (and Christian) girls are often targeted by Muslims for forced conversion to Islam. According to the National Commission of Justice and Peace and the Pakistan Hindu Council (PHC) around 1,000 non-Muslim minority women are converted to Islam and then forcibly married off to their abductors or rapists.

Christians (Urdu: مسيحى، عیسائی) make up 1.3% of Pakistan's population. The majority of the Pakistani Christian community consists of Punjabis who converted during the British colonial era and their descendants. Pakistani Christians mainly live in Punjab and in urban centres. There is also a Roman Catholic community in Karachi which was established by Goan and Tamil migrants when Karachi's infrastructure was being developed between the two World Wars. A few Protestant groups conduct missions in Pakistan. The present Christian population in Pakistan is ranged between 2 and 3 million as per as recent (2020–21) year estimation by various institution and NGOs of Pakistan. There is a small myth that Christianity has been existent in Pakistan ever since a few decades after the crucifixion of Jesus. This myth became more popular after the finding of a structure looking like a giant cross in Northern Pakistan, but there is almost no evidence that this cross is related to Christianity.

There are a number of church-run schools in Pakistan that admit students of all religions, including Forman Christian College, St. Patrick's Institute of Science & Technology and Saint Joseph's College for Women, Karachi.

Pakistan is number eight on Open Doors’ 2022 World Watch List, an annual ranking of the 50 countries where Christians face the most extreme persecution. Cases collected by Global Human Rights Defence show that young underage Christian (and Hindu) girls are sometimes targeted by Muslims for forced conversion to Islam. Christians also often face abuses of Pakistani blasphemy laws, notably in the case of Asia Bibi.

In the 15th century, the Sikh faith was born in the Punjab region (of present day India and Pakistan) where Sikhism's founder Guru Nanak was born. Home to some of the world's most sacred gurdwaras, Sikhs have a become a crucial part in Pakistan's religious tourism with large numbers coming to the country particularly during festivals. Aside from religious tourists, estimates on the Sikh population permanently residing in Pakistan vary due to the community being excluded from the national census up until 2023 which marks the first inclusion of Sikhs in census data since partition (where almost 99% fled to India). The results of the 2023 Census of Pakistan thus are significant in the first official Sikh count since the formation of Pakistan as a sovereign nation.

In a news article published in December 2022, there was an estimated 30,000–35,000 Sikhs in Pakistan according to Gurpal Singh. Other sources, including the US Department of State, claim the Sikh population in Pakistan to be at 20,000. Though full community counts have not yet been available, the National Database and Registration Authority (NADRA) does provide the numbers of eligible voters belonging to minority religions (registered in electoral rolls):

• 2013: 5,934 Sikh Voters
• 2018: 8,852 Sikh Voters

In recent years, their numbers have increased with many Sikhs migrating from neighboring Afghanistan who have joined their co-religionists in Pakistan.

The Baháʼí Faith in Pakistan begins previous to its independence when it was still under British colonial rule. The roots of the religion in the region go back to the first days of the Bábí religion in 1844, with Shaykh Sa'id Hindi who was from Multan. During Bahá'u'lláh's lifetime, as founder of the religion, he encouraged some of his followers to move to the area that is present day Pakistan.

The Baháʼís in Pakistan have the right to hold public meetings, establish academic centers, teach their faith, and elect their administrative councils. Bahá'í sources claim their population to be around 30,000. Shoba Das of Minority Rights Group International reported around 200 Baháʼís in Islamabad and between 2,000 and 3,000 Baháʼís in Pakistan, in 2013. One more PhD thesis says that "It is an assumption that the Bahá’ís do not want to declare their exact population, which is supposed to be more or less 3,000 in total". Most of these Bahá’ís have their roots in Iran.

There are at least 4,000 Pakistani citizen practicing the Zoroastrian religion. The region of Balochistan is believed to be a stronghold of Zoroastrianism before the advent of Islam. With the flight of Zoroastrians from Greater Iran into the Indian subcontinent, the Parsi communities were established. More recently, from the 15th century onwards, Zorastrians came to settle the coast of Sindh and have established thriving communities and commercial enterprises. At the time of independence of Pakistan in 1947, Karachi and Lahore were home to a thriving Parsi business community. Karachi had the most prominent population of Parsis in Pakistan, though their population is declining. Parsis have entered Pakistani public life as social workers, business folk, journalists and diplomats. The most prominent Parsis of Pakistan today include Ardeshir Cowasjee, Byram Dinshawji Avari, Jamsheed Marker, as well as Minocher Bhandara. The founding father of Pakistan, Muhammad Ali Jinnah, married Ratti Bai who belonged to a Parsi family before her conversion to Islam.

The Kalash people practise a form of ancient Hinduism mixed with animism. Adherents of the Kalash religion number around 3,000 and inhabit three remote valleys in Chitral; Bumboret, Rumbur and Birir. Their religion has been compared to that of ancient Greece, but they are much closer to the Hindu traditions in other parts of the Indian subcontinent. It is more similar to the historical Vedic religion, than later forms of Hinduism.

Several ancient Jain shrines are scattered across the country. Baba Dharam Dass was a holy man whose tomb is located near the bank of a creek called (Deoka or Deokay or Degh) near Chawinda Phatic, behind the agricultural main office in Pasrur, near the city of Sialkot in Punjab, Pakistan. Another prominent Jain monk of the region was Vijayanandsuri of Gujranwala, whose samadhi (memorial shrine) still stands in the city.

Buddhism has an ancient history in Pakistan; currently there is a small community of at least 1500 Pakistani Buddhist in the country. The country is dotted with numerous ancient and disused Buddhist stupas along the entire breadth of the Indus River that courses through the heart of the country. Many Buddhist empires and city states existed, notably in Gandhara but also elsewhere in Taxila, Punjab and Sindh.

The number of Buddhist voters was 1,884 in 2017 and are mostly concentrated in Sindh and Punjab.

Various estimates suggest that there were about 1,500 Jews living in Pakistan at the time of its independence on 14 August 1947, with the majority living in Karachi and a few living in Peshawar. However, almost all emigrated to Israel after 1948. There are a few disused synagogues in both cities; while one Karachi synagogue was torn down for the construction of a shopping mall. The one in Peshawar still exists, although the building is not being used for any religious purpose. There is a small Jewish community of Pakistani origin settled in Ramla, Israel.

One Pakistani, Faisal Khalid (a.k.a. Fishel Benkhald) of Karachi claims to be Pakistan's only Jew. He claimed that his mother is Jewish (making him Jewish by Jewish custom) but, his father is a Muslim. Pakistani authorities have issued him a passport which stated Judaism as his religion and have allowed him to travel to Israel.

Irreligion is present among a minority of mainly young people in Pakistan. There are people who do not profess any faith (such as atheists and agnostics) in Pakistan, but their numbers are not known. They are particularly in the affluent areas of the larger cities. Some were born in secular families while others in religious ones. According to the 1998 census, people who did not state their religion accounted for 0.5% of the population, but social pressure against claiming no religion was strong. A 2012 study by Gallup Pakistan found that people not affiliated to any religion account for 1% of the population. Many atheists in Pakistan have been lynched and imprisoned over unsubstantiated allegations of blasphemy. When the state initiated a full-fledged crackdown on atheism since 2017, it has become worse with secular bloggers being kidnapped and the government running advertisements urging people to identify blasphemers among them and the highest judges declaring such people to be terrorists.

In 2022, Freedom House rated Pakistan’s religious freedom as 1 out of 4, noting that the blasphemy laws are often exploited by religious vigilantes and also curtail the freedom of expression by Christians and Muslims, especially Ahmadi Muslims. Hindus have spoken of vulnerability to kidnapping and forced conversions. Pakistan, a Muslim-majority country of about 220 million, is often under fire for crimes against members of its religious minorities, including Christians, Ahmadi and Shi’ite Muslims, and Hindus.

• Blasphemy law in Pakistan
• Demographics of Pakistan
• List of religious populations
• Major religious groups
• Religious Minorities in Pakistan
• Shamanism in Pakistan
• Freedom of religion in Pakistan
• Pakistan National Commission for Minorities

• Ministry of Religious Affairs – (Government of Pakistan) Official website