Järfälla Municipality (Swedish: Järfälla kommun) is a municipality in Stockholm County in east central Sweden, and is considered a suburb of Stockholm. Its seat is located in Jakobsberg, part of the Stockholm urban area.

Järfälla has not been amalgamated with other municipalities in the two local government reforms carried out during the 20th century. The Stäket area in the north was, however, added in 1952.

It is located about 20 km north of Stockholm, with a part situated by the shore of Lake Mälaren. It takes about 20 minutes to reach downtown Stockholm by Stockholm commuter rail.

Järfälla traces its history to the Stone Age and has some ruins from that time. After being Christianized in the 11th century, a church was built around the year 1200 that still stands today. Järfälla continued to be of some importance in the Middle Ages as several important roads went through it. Furthermore, the centre of the hundred was located within the boundaries of the municipality from 1675 to 1905

Its coat of arms, which depicts a golden lamb carrying an archbishop's cross, can be traced from 1568, but was created in 1955. They may symbolize that Järfälla is situated on the road from the capital Stockholm to the seat of the archbishop in the nearby city of Uppsala.

The main population expansion came in the 1930s and 1940s, when many residential houses were built in the seat Jakobsberg for middle-class families commuting to Stockholm.

The municipality is served by the Stockholm public transport system. There are three Stockholm commuter rail stations, Barkarby, Jakobsberg and Kallhäll, as well as a bus network. As part of a larger plan for the Stockholm region, Barkarby station and Barkarbystaden will get metro stations, scheduled to open in 2026. The representatives for the municipalities signed the deal in January 2014, and on 3 March 2014 Järfälla municipal council made the formal decision to fulfill their part of the deal.

Population development in Järfälla Municipality 1970–2019

Year	Population
1970	49,261
1975	51,549
1980	53,321
1985	56,020
1990	56,359
1995	58,675
2000	60,471
2005	61,743
2010	66,211
2015	72,429
2017	76,453
2019	79,990
Source: SCB - Folkmängd efter region och år.

This is a demographic table based on Järfälla Municipality's electoral districts in the 2022 Swedish general election sourced from SVT's election platform, in turn taken from SCB official statistics.

In total there were 82,998 residents, including 57,777 Swedish citizens of voting age. 50.7% voted for the left coalition and 46.8% for the right coalition. Indicators are in percentage points except population totals and income.

Location	Residents	Citizen adults	Left vote	Right vote	Employed	Swedish parents	Foreign heritage	Income SEK	Degree
			%	%
Barkarbystaden	2,978	2,227	57.2	40.3	80	44	56	29,850	50
Berghem/Polhem	2,649	1,885	43.9	54.5	85	63	37	33,036	54
Bolinder strand	1,817	1,583	47.3	50.7	89	74	26	34,766	62
Centrala Jakobsberg	1,541	1,098	58.7	39.1	72	32	68	20,723	45
Centrala Kallhäll	2,262	1,700	57.1	40.6	82	62	38	27,323	55
Centrala Viksjö N	2,168	1,594	48.6	48.7	75	55	45	23,986	34
Centrala Viksjö S	2,247	1,654	47.6	51.3	85	68	32	28,198	45
Dackevägen	2,026	1,161	57.9	37.9	72	25	75	21,626	35
Ekedal	2,386	1,573	62.1	35.4	69	29	71	21,121	39
Emaljvägen/Kopparv.	2,313	1,603	56.8	41.4	79	50	50	24,802	45
Fastebol	2,122	1,493	43.4	55.8	85	74	26	34,576	53
Fjällen	1,650	1,311	48.4	50.5	85	76	24	33,791	53
Grönvreten	1,500	1,072	48.2	50.3	81	69	31	34,005	61
Hammaren	2,418	1,705	57.9	38.5	72	41	59	22,229	41
Hummelmora	1,851	1,379	41.6	57.0	86	72	28	31,322	48
Högby	1,967	1,434	45.7	52.7	84	66	34	31,310	50
Kalvshälla	2,663	1,679	57.3	39.4	83	37	63	29,706	52
Karlslund	1,518	982	53.3	44.3	83	37	63	30,779	55
Kolarängen/Villast.	2,158	1,480	46.0	52.3	81	64	36	28,723	41
Lilla Ulvsättra	1,636	952	62.2	33.2	66	28	72	19,798	29
Lund	1,610	1,204	44.7	54.2	82	72	28	29,483	38
Lädersättra	2,288	1,622	56.3	41.9	80	53	47	26,300	46
Neptuni	2,391	1,699	45.8	52.2	83	64	36	32,469	47
Norra Aspnäs	1,070	704	54.1	42.4	71	37	63	21,746	41
Norra Barkarby	1,854	1,330	58.2	39.3	76	61	39	24,366	45
Nyberg	1,541	871	67.6	27.2	65	15	85	18,015	36
Olovslund	2,166	1,564	42.5	55.6	81	66	34	33,213	58
Orgona	1,939	1,307	48.2	50.8	85	65	35	30,960	51
Sandvik	2,064	1,508	47.6	50.7	85	71	29	31,943	47
Skälby Gård V	1,922	1,222	39.1	58.4	86	68	32	35,169	52
Skälby Gård Ö	1,742	1,205	35.0	63.1	84	69	31	35,125	52
Snapphanen	1,623	1,030	65.0	25.4	66	19	81	18,712	29
Stäket	2,623	1,867	40.3	58.0	83	70	30	35,046	53
Södra Aspnäs	2,522	1,846	60.3	37.0	70	34	66	20,667	34
Södra Barkarby	2,230	1,603	43.5	54.8	82	68	32	32,045	60
Södra Nyberg	1,556	941	62.0	32.7	70	27	73	21,734	33
Södra Vibblaby	1,603	1,003	52.9	43.7	83	33	67	29,289	53
Tallbohov	1,544	926	62.5	27.9	66	15	85	18,267	33
Ulvsättra/Skogstorp	1,308	885	50.6	47.1	81	63	37	28,940	52
Vattmyra	1,997	1,465	49.5	49.0	82	56	44	31,160	55
Vibblaby	1,795	1,204	54.8	41.7	75	46	54	23,622	51
Västerby	1,740	1,206	53.4	44.2	81	53	47	26,434	46
Source: SVT

On 31 December 2017 the number of people with a foreign background (persons born outside of Sweden or with two parents born outside of Sweden) was 31,031, or 40.59% of the population (76,453 on 31 December 2017). On 31 December 2002 the number of residents with a foreign background was (per the same definition) 15,550, or 25.37% of the population (61,290 on 31 December 2002). On 31 December 2017 there were 76,453 residents in Järfälla, of whom 22,215 people (29.06%) were born in a country other than Sweden. These are divided by country in the table below; the Nordic countries as well as the 12 most common countries of birth outside of Sweden for Swedish residents have been included, with other countries of birth bundled together by continent by Statistics Sweden.

Country of birth
31 December 2017
1	Sweden	54,238
2	Asia: Other countries	2,815
3	Iraq	2,295
4	European Union: Other countries	2,187
5	Iran	1,895
6	Finland	1,827
7	Syria	1,753
8	Africa: Other countries	1,478
9	South America	1,380
10	Poland	1,176
11	Somalia	856
12	Europe outside of the EU: other countries	781
13	Turkey	768
14	Eritrea	620
15	Thailand	420
16	Afghanistan	351
17	Germany	350
18	North America	328
19	Bosnia and Herzegovina	214
20	Yugoslavia/ Yugoslavia SFR Yugoslavia/ Serbia and Montenegro	203
21	Norway	196
22	Denmark	141
23	Soviet Union	82
24	Iceland	43
25	Oceania	41
26	Unknown country of birth	15

• Viksjö
• Jakobsberg
• Barkarby
• Skälby
• Kallhäll
• Stäket

The following sports clubs are located in Järfälla:

• AFC Järfälla
• FC Järfälla
• FC Järfälla Academy
• IFK Viksjö
• Bele Barkarby FF
• Kallhälls FF
• Järfälla FF
• IF Söderhöjden Wasa

• Jakobsbergs IBF
• Järfälla Spiders
• Stäkets IF
• Bele Barkarby IF

• Järfälla Basket

• Järfälla HC
• Kallhälls IF
• Bele Barkarby IF

• Elfa AB (1945)
• Old Environmental Party in Järfälla

• Järfälla Municipality - Official site