County · Colorado

Jefferson County, Colorado

Jefferson County, Colorado. Jefferson County had 580,451 residents in 2025 by the Census Bureau's estimate, down 0.4% since 2020, while Colorado grew 4.1%. It holds 27 places (12 cities, villages and boroughs and 15 census-designated) and 146 census tracts. GEOID 08059.

Jefferson County is one of the 10 counties of the Denver-Aurora-Centennial, CO metropolitan statistical area (the Census Bureau's July 2023 delineation).

Residents, July 2025 estimate

580,451

Census Bureau estimate (no margin published)
2020 Census count: 582,910 · ACS 2020-2024: 579,377

Median household income

$110,656

±$1,614 (90% margin)
Colorado: $95,470

Median home value

$637,600

±$3,257 (90% margin)
Colorado: $539,400

Median gross rent

$1,861

±$19 (90% margin)
Colorado: $1,761

How many people live in Jefferson County, and is it growing?

The 2020 Census counted 582,910 residents in Jefferson County. The Census Bureau estimates 580,451 for July 1, 2025, down 0.4% since 2020, while Colorado grew 4.1%. The 2020-2024 American Community Survey puts the population at 579,377 over 764 square miles of land.

July 2020→2021 −2,129 (581,002)
2021→2022 −4,299 (576,703)
2022→2023 +1,381 (578,084)
2023→2024 +2,275 (580,359)
2024→2025 +92 (580,451)

Jefferson County in Colorado. Boundaries: Census Bureau 2024.

Counts, ACS 2020-2024 5-year estimates, with the change from 2015-2019
Measure	Jefferson County	Colorado	Change since 2015-2019
Total population	579,377	5,862,189	+4,579
Households	241,735±959	2,374,218	+9,451
Average household size	2.36±0.01	2.42	−0.08
Housing units	253,574±276	2,589,053	+12,618

Jefferson County's population since 2000

From 527,056 in 2000 to 580,451 in 2025: up 10.1%. The 2000, 2010 and 2020 figures are census counts. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.

2000 Census 527,056
2005 (estimate) 519,675
2010 Census 534,543
2015 (estimate) 565,240
2020 Census 582,910
2025 (estimate) 580,451

Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov

What cities and towns are in Jefferson County?

Jefferson County holds 27 places: 12 cities, villages and boroughs (incorporated places) and 15 census-designated places. The largest is Lakewood with 156,927 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.

Places in Jefferson County, ACS 2020-2024 5-year estimates. Ring: estimate with a coefficient of variation over 40%.

Lakewood	city	155,984	156,583±83	$89,792	$574,400	9.2%	100%
Arvada	city	124,402	122,634±84	$117,348	$632,600	5.8%	98%
Westminster	city	116,317	115,484±75	$100,272	$532,400	7.3%	39%
Dakota Ridge	CDP	33,892	33,753±1,425	$120,822	$604,600	4.4%	100%
Ken Caryl	CDP	33,811	33,233±1,582	$118,269	$600,300	3.7%	100%
Wheat Ridge	city	32,398	32,070±87	$90,564	$623,000	11.2%	100%
Columbine	CDP	25,229	25,478±1,564	$131,232	$617,200	4.3%	92%
Golden	city	20,399	20,417±51	$98,582	$837,700	12.6%	100%
Fairmount	CDP	9,324	9,902±963	$163,600	$827,600	2.9%	100%
Evergreen	CDP	9,307	8,602±1,077	$150,417	$829,400	3.3%	100%
Applewood	CDP	7,833	8,350±790	$130,545	$785,900	4.4%	100%
Edgewater	city	5,005	4,932±22	$76,591	$636,900	15.2%	100%
West Pleasant View	CDP	4,327	5,051±853	$95,817	$489,400	11.7%	100%
Genesee	CDP	3,610	3,778±436	$186,667	$1,032,700	2.4%	100%
Littleton	city	45,652	44,710±388	$98,839	$630,600	6.1%	5%
Coal Creek, Boulder County	CDP	2,494	2,346±516	$134,250	$625,800	5.4%	62%
Indian HillsGEOID 0838810	CDP	1,474	986±384	$178,980	$789,200	6.8%	100%
KittredgeGEOID 0841065	CDP	1,308	812±363	$222,500	$744,000	3.8%	100%
Aspen ParkGEOID 0803730	CDP	810	742±279	$104,167	$693,100	0.0%	100%
Mountain View	town	541	609±154	$106,875	$596,800	11.7%	100%
Morrison	town	396	412±86	$122,083	$875,000	2.7%	100%
Brook ForestGEOID 0808950	CDP	622	355±150	$116,528	$693,300	9.3%	54%
East Pleasant ViewGEOID 0822575	CDP	333	832±427	$106,920	$485,700	10.0%	100%
Bow Mar	town	853	1,047±205	$241,583	$2,000,000 or more	3.5%	31%
IdledaleGEOID 0838480	CDP	244	297±209	not published	$451,900	0.0%	100%
LakesideGEOID 0842495	town	16	4±4	not published	not published	50.0%	100%
Superior	town	13,094	13,305±67	$159,434	$903,900	3.2%	0%

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov

Who lives in Jefferson County?

The median resident of Jefferson County is 40.5 years old; 18.5% are under 18 and 17.9% are 65 or older. The largest group is non-Hispanic white residents at 75.2%, then Hispanic or Latino residents (of any race) at 16.1%. 6.3% of residents were born outside the United States.

Age, origin and education, ACS 2020-2024 5-year estimates. Race groups are non-Hispanic; Hispanic includes any race.
Measure	Jefferson County	Colorado	Change since 2015-2019
Median age	40.5±0.2	37.7	no clear change
Under 18 years	18.5%±0.1 pts	21.0%	–
65 years and over	17.9%±0.1 pts	15.6%	–
Hispanic or Latino (any race)	16.1%	22.5%	+0.7 pts
White alone, not Hispanic	75.2%±0.2 pts	64.8%	−2.9 pts
Black or African American alone, not Hispanic	1.1%±0.1 pts	3.8%	no clear change
Asian alone, not Hispanic	2.9%±0.1 pts	3.2%	no clear change
American Indian and Alaska Native alone, not Hispanic	0.2%±0.1 pts	0.4%	–
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0.1%±0.1 pts	0.1%	–
Two or more races, not Hispanic	4.0%±0.2 pts	4.6%	–
Some other race alone, not Hispanic	0.4%±0.1 pts	0.5%	–
Born outside the United States	6.3%±0.3 pts	9.8%	no clear change
Speak a language other than English at home (age 5+)	10.0%±0.4 pts	16.2%	–
Civilian veterans (age 18+)	6.5%±0.2 pts	7.5%	–
With a disability	11.0%±0.3 pts	11.4%	–
No health insurance coverage	5.3%±0.3 pts	7.7%	no clear change
High school graduate or higher (age 25+)	95.8%±0.3 pts	92.9%	–
Bachelor's degree or higher (age 25+)	52.0%±0.7 pts	45.7%	+6.8 pts
Graduate or professional degree (age 25+)	19.3%±0.5 pts	17.6%	–
Moved from another state in the past year	2.9%±0.3 pts	3.8%	–

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov

What do households in Jefferson County earn?

Half of Jefferson County's 241,735 households earn less than $110,656 a year (±$1,614), against $95,470 in Colorado. In 2015-2019 the median was $102,130 in 2024 dollars, so it rose by $8,526 after inflation. 6.7% of residents live below the poverty line.

Income and poverty in 2024 dollars, ACS 2020-2024 5-year estimates
Measure	Jefferson County	Colorado	Change since 2015-2019
Median household income	$110,656±$1,614	$95,470	+$8,526
Mean household income	$142,995±$1,864	$128,255	–
Per capita income	$60,827±$743	$52,636	+$6,530
People below the poverty line	6.7%±0.4 pts	9.4%	no clear change
Children under 18 below the poverty line	7.0%±1.1 pts	11.1%	no clear change
Households receiving SNAP	5.5%±0.4 pts	8.5%	–
Households with a broadband subscription	95.1%±0.3 pts	93.5%	–

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov

What does housing cost in Jefferson County?

Owners occupy 70.7% of Jefferson County's occupied homes and renters 29.3%. The median owner-occupied home is valued at $637,600 by its owner (±$3,257). The median renter pays $1,861 a month including utilities, and 42.5% of renters pay 35% or more of their income on rent.

Housing, ACS 2020-2024 5-year estimates
Measure	Jefferson County	Colorado	Change since 2015-2019
Median home value (owner-occupied)	$637,600±$3,257	$539,400	+$148,153
Median gross rent	$1,861±$19	$1,761	+$168
Renters paying 35% or more of income on rent	42.5%±1.6 pts	42.7%	no clear change
Median monthly owner costs, with a mortgage	$2,498±$27	$2,326	–
Owner-occupied homes	70.7%±0.6 pts	66.2%	no clear change
Housing units	253,574±276	2,589,053	+12,618
Homeowner vacancy rate	0.6%±0.2 pts	0.8%	–
Rental vacancy rate	4.9%±0.7 pts	5.1%	–
Single-family detached homes	63.8%±0.6 pts	61.4%	–
Mobile homes	0.8%±0.1 pts	3.5%	–
Built 2020 or later	1.7%±0.2 pts	3.0%	–
Built 1939 or earlier	2.8%±0.3 pts	7.0%	–

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov

How many new homes is Jefferson County building?

Builders took permits for 1,118 new housing units across Jefferson County in 2025 (810 single-family), 1.9 per 1,000 residents.

2019 1,809 units
2020 2,161 units
2021 2,515 units
2022 2,206 units
2023 1,188 units
2024 1,172 units
2025 1,118 units

Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey

How do people in Jefferson County get to work?

64.4% of Jefferson County's workers drive alone and 25.4% work from home. The average trip to work takes 26.0 minutes. The unemployment rate in 2020-2024 averaged 3.9%.

Work and commuting, ACS 2020-2024 5-year estimates
Measure	Jefferson County	Colorado	Change since 2015-2019
In the labor force (age 16+)	69.3%±0.4 pts	68.6%	–
Unemployment rate	3.9%±0.3 pts	4.6%	no clear change
Drove alone to work	64.4%±0.8 pts	65.1%	–
Carpooled	5.7%±0.4 pts	7.7%	–
Public transportation	1.3%±0.2 pts	1.6%	–
Walked	1.4%±0.2 pts	2.5%	–
Worked from home	25.4%±0.7 pts	21.0%	+16.3 pts
Mean travel time to work	26.0 min±0.3	25.2 min	−2.0 min

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov

What are Jefferson County's census tracts?

Jefferson County is divided into 146 census tracts. Among those with a reliable estimate, median household income runs from $48,942 (Tract 111.02) to $226,250 (Tract 117.24).

All 146 census tracts of Jefferson County, with their figures

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov

How does Jefferson County compare with Colorado's other counties?

Jefferson County's rank among Colorado's counties with a reliable estimate (1 = highest)
Measure	Rank
Population	4th of 64
Growth 2020-2025	42nd of 64
Residents per square mile	4th of 64
Median household income	4th of 64
Median home value	12th of 64
Median gross rent	11th of 63
Poverty rate	56th of 63
Bachelor's degree or higher	15th of 64
Median age	40th of 64

Every county in Colorado

Source: PlainCities ranks from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed

How these figures are made: methodology and release checks · reading a margin of error · every state · corrections

Not on this page: crime, weather and schools for Jefferson County are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.