The Karimun Regency is located in the Riau Islands Province, Indonesia. Besides the central island of Great Karimun, the regency also includes the island of Kundur and over 240 lesser islands. The district covers a land area of 1,339.9 km and a sea area of 6,460 km, and its population was 212,561 at the 2010 census and 253,457 at the 2020 census; the official estimate as at mid 2023 was 270,121.

The regency was originally divided into three districts (kecamatan) — Moro, Kundur and Karimun. In accordance with Law (Undang-Undang) Nomor 53 of 1999, enacted in Jakarta on 4 October 1999, these three were expanded to nine districts, with the creation of the new districts of Meral, Tebing, Buru, Kundur Utara, Kundur Barat and Durai. On 11 June 2012 a further three districts were added, based on Regional Regulation No. 02 of 2012, effective in July 2012 – Ungar (from part of Kundur District), Belat (from part of Kundur Utara District), and Meral Barat (out of the western part of Meral District). Then in 2022 two additional districts were created, based on Regional Regulation No. 2 of 2022, effective in February 2022 – Sugie Besar (from part of Moro District) and Selat Gelam (from part of Buru District).

The fourteen districts are tabulated below with their areas and populations at the 2010 and 2020 censuses, together with the official estimates as at mid 2023. The table also includes the locations of the district administrative centres, the number of administrative villages (rural desa and urban kelurahan) and the number of islands within each district, and their postal codes. However, for the two most recent districts created in 2022, their 2010 and 2020 Census populations, and the numbers of islands in these new districts are included with the figures for the districts from which they were removed.

Great Karimun Island (Pulau Karimunbesar) comprises the districts of Karimun (which forms Tanjung Balai town), Meral, Tebing and Meral Barat. Kundur Island is a group of islands comprising the districts of Kundur, Kundur Utara, Kundur Barat, Ungar, Belat, Buru and Selat Mendaun (or Selat Gelam).

Kode Wilayah	Name of District (kecamatan)	Area in km	Pop'n Census 2010	Pop'n Census 2020	Pop'n Estimate mid 2023	Admin centre	No. of kelu- rahan	No. of desa	No. of islands	Post Code
21.02.01	Moro	50.16	17,512	18,640	11,431	Moro	2	3	86	29663
21.02.09	Durai	170.42	5,821	6,026	6,451	Telaga Tujuh	-	4	47	29665
21.02.14	Sugie Besar	175.07			7,967	Rawajaya	-	7		29663
21.02.02	Kundur	138.20	33,878	30,490	31,335	Tanjung Batu Kota	3	3	24	29662
21.02.07	Kundur Utara (North Kundur)	149.40	17,066	12,653	13,048	Tanjung Berlian Kota	1	4	23	29662
21.02.08	Kundur Barat (West Kundur)	121.10	16,146	18,854	19,444	Sawang	1	4	12	29662
21.02.11	Ungar	47.10		5,660	5,943	Sei Buluh	1	3	26	29669
21.02.12	Belat	85.01		6,346	6,805	Sebele	-	6	22	29660
21.02.03	Karimun	16.84	42,601	51,353	47,765	Tanjung Balai Kota	6	-	24	29661
21.02.06	Buru	57.99	8,967	9,770	10,646	Buru	2	2	7	29664
21.02.04	Meral	25.57	44,627	48,964	53,255	Meral Kota	6	-	4	29666
21.02.05	Tebing	52.76	25,943	29,721	34,544	Tebing	5	1	2	29668
21.02.10	Meral Barat (West Meral)	54.25		14,980	17,245	Darussalam	2	2	22	29667
21.02.13	Selat Gelam	196.03			4,242	Parit	-	3		29661
21.02	Totals	1,339.90	212,561	253,457	270,121		29	42	256

Note: (a) a group of islands east of Kundur, situated to the southwest of Batam Island; the largest islands are Sugie, Citlim and Moro Tengah (others are Sugibawah, Moro Laut, Moro Darat and Durian); in 2022 an extra district was cut out of Moro District; this Sugie Besar District incorporates 7 of the 10 desa formerly in Moro District.
(b) the two kelurahan are Moro and Moro Timur. (c) a group of islands situated to the southeast of Kundur Island. (d) the 3 kelurahan are Gading Sari, Tanjung Batu Barat and Tanjung Batu Kota.
(e) includes one kelurahan. (f) the 2010 Census figure for the new Ungar District is included with that for Kundur District, from which the new district was cut out on 11 June 2012.
(g) the 2010 Census figure for the new Belat District is included with that for Kundur Utara District, from which the new district was cut out on 11 June 2012.
(h) the 6 kelurahan are Lubuk Semut, Sungai Lakam Barat, Sungai Lakam Timur, Tanjung Balai, Tanjung Balai Kota and Teluk Air.
(i) In 2022 an extra district was cut out of Buru District; this Selat Gelam District (alternatively called Selat Mendaun District) incorporates 3 of the 5 desa formerly in Buru District, i.e. Parit, Tulang and Selat Mendaun desa.
(j) the two kelurahan are Buru and Lubuk Puding. (k) the 6 kelurahan are Baran Barat, Baran Timur, Meral Kota, Parit Benut, Sungai Raya and Sungai Pasir. (l) the 5 kelurahan are Harjosari, Kapling, Pamak, Tebing and Teluk Uma.
(m) the 2010 Census figure for the new Meral Barat District is included with that for Meral District, from which the new district was cut out on 11 June 2012. (n) the two kelurahan are Darussalam and Pasir Panjang.

Islam is the dominant religion in the regency, with 84.09% of the total population identifying as Muslim. Other religions are Buddhism, which forms 10.68% of the total population, Christianity, which forms 4.85% of the total population, Hinduism, which forms 0.01% of the total population, and Confucianism, which forms 0.37% of the total population.

• Official website (in Indonesian)

• Great Karimun, the main island in the regency
• Little Karimun
• Kundur Island