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COUNTY · 2010 ACS

Jefferson County

Colorado · 534,543 residents · 764 sq mi
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The short version

Jefferson County is home to 534,543 people in Colorado. About 39% of adults have finished a four-year degree. The median age is 40.4, about 3 years above the US median. Poverty is uncommon here, at 8.0% of people here. 6% of people here were born outside the United States. That is roughly 17% ahead of the Colorado median.

At a glance
Wealthier
above the US median
US median: $52,703
Older
median age 40.4
US median: 37.2
More educated
39% hold a bachelor's degree
US average: 28%
Stable housing
home values roughly flat, inflation adjusted
US median home: $225,659
Section 01

Population & growth

Total population
534,543
+1%since 2000
from 527,056 in 2000
1990 – 2025
Median age
40.4
+10%since 2000
from 36.8 in 2000
US average: 37.2
Land area
764 sq mi
Population, 1990 – 2024
424K467K511K554K597K19902000201020202024Jefferson County
2024579K
1990201020202024
Age distribution, 2010
Under 55.7%(30,411)
US avg: 6.5%
5 to 96.1%(32,839)
US avg: 6.6%
10 to 146.4%(33,982)
US avg: 6.7%
15 to 196.6%(35,312)
US avg: 7.1%
20 to 245.9%(31,415)
US avg: 7%
25 to 3412.3%(65,801)
US avg: 13.3%
35 to 4413.5%(71,975)
US avg: 13.3%
45 to 5417.1%(91,184)
US avg: 14.6%
55 to 6413.9%(74,213)
US avg: 11.8%
65 to 747%(37,585)
US avg: 7%
75 to 844%(21,231)
US avg: 4.2%
85 and over1.6%(8,595)
US avg: 1.8%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02

Income & economy

Median household income
$66,075
−9%inflation adjusted, since 2000
from $57,339 in 2000
US average: $52,703
1990 – 2024
Per capita income
$34,714
+24%since 2000
from $28,066 in 2000
US average: $27,286
Households earning $100K+
43.3%
+0.3 ptssince 2009
from 43.0% in 2009
US average: 33.3%
Poverty rate
8.0%
+2.9 ptssince 2000
from 5.2% in 2000
US average: 13.8%
Income inequality (Gini)
0.426
US average: 0.461
Workforce by industry, 2010
Information10.9%
US avg: 11.5%
Wholesale trade8.6%
US avg: 7.2%
Retail trade8.1%
US avg: 10.9%
Other services8.1%
US avg: 7%
Public administration5.5%
US avg: 4.9%
Finance & insurance4.5%
US avg: 5.1%
Professional, scientific, technical3.6%
US avg: 4.2%
Transportation & warehousing3.5%
US avg: 3.1%
Arts, entertainment, food3.5%
US avg: 2.4%
Agriculture, forestry, fishing1.2%
US avg: 1.9%
Education & health services0.9%
US avg: 0.9%
Manufacturing0.9%
US avg: 0.5%
Construction0.3%
US avg: 1.4%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 03

Housing

Median home value
$259,300
+11%inflation adjusted, since 2000
from $184,200 in 2000
US average: $225,659
1990 – 2024
Median gross rent
$900
−6%inflation adjusted, since 2000
from $760 in 2000
US average: $853
Owner-occupied
70.7%
−1.8 ptssince 2000
from 72.5% in 2000
29.3% rent
Vacancy rate
5.2%
+0.1 ptssince 2009
from 5.1% in 2009
US average: 12.1%
Persons per household
2.41 people
Unchangedsince 2009
from 2.42 people in 2009
US average: 2.60
Owner cost-burdened
29.8%
−0.4 ptssince 2009
from 30.2% in 2009
US average: 30.9%
Renter cost-burdened
46.9%
−0.1 ptssince 2009
from 47.1% in 2009
US average: 46.8%
Afford Score
3.9
Unchangedsince 2009
from 3.9 in 2009
2009 – 2024
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
Section 04

Race & ethnicity

2000
White, non-Hispanic84.9%(447,416)
Black0.8%(4,312)
Hispanic / Latino10%(52,449)
Asian2.2%(11,855)
Other0%
2010
White, non-Hispanic79.9%(427,160)
Black0.9%(5,001)
Hispanic / Latino14.3%(76,445)
Asian2.6%(13,682)
Other2.2%(11,596)

No data for the years selected.

Section 04 · Origins

Detailed origins & ancestry

Hispanic origin
Mexican9.1%(48,023)
Spaniard0.9%(4,735)
South American0.4%(1,855)
Central American0.3%(1,424)
Puerto Rican0.2%(938)
Salvadoran0.2%(931)
Cuban0.1%(592)
Colombian0.1%(574)
Peruvian0.1%(417)
Ecuadorian0%(255)
Chilean0%(238)
Venezuelan0%(193)
+ 8 more hispanic origin groups with data
Honduran0%(167)
Panamanian0%(132)
Dominican0%(112)
Argentine0%(98)
Bolivian0%(55)
Uruguayan0%(25)
Ancestry
German27.6%(146,131)
Irish15.7%(83,036)
English14.2%(75,274)
Italian6.7%(35,381)
French4.1%(21,600)
American4%(21,134)
Swedish3.6%(19,008)
Scottish3.4%(17,967)
Polish3.1%(16,430)
Norwegian2.9%(15,569)
Scotch-Irish2.5%(13,390)
Dutch2.1%(10,993)
+ 45 more ancestry groups with data
Russian1.2%(6,294)
Danish1.2%(6,267)
Welsh1.1%(5,595)
Czech0.9%(4,637)
French Canadian0.6%(3,340)
Swiss0.6%(3,130)
British0.6%(3,103)
Austrian0.5%(2,623)
Greek0.5%(2,459)
Hungarian0.4%(2,337)
Arab0.3%(1,755)
Ukrainian0.3%(1,690)
Finnish0.3%(1,469)
Canadian0.3%(1,427)
Belgian0.3%(1,361)
Lithuanian0.2%(1,201)
Croatian0.2%(1,012)
Slovak0.2%(988)
Romanian0.2%(926)
Portuguese0.2%(881)
Iranian0.1%(475)
Slovene0.1%(472)
Armenian0.1%(431)
Lebanese0.1%(425)
Brazilian0.1%(368)
West Indian0.1%(289)
Latvian0.1%(287)
Australian0.1%(272)
Bulgarian0.1%(269)
Serbian0%(250)
Turkish0%(231)
Moroccan0%(175)
Syrian0%(127)
Jamaican0%(120)
Jordanian0%(95)
Ethiopian0%(83)
Haitian0%(75)
Iraqi0%(47)
Egyptian0%(39)
Nigerian0%(23)
Israeli0%(20)
Ghanaian0%(15)
Section 05

Education

Bachelor's degree or higher
39.3%
+2.8 ptssince 2000
from 36.5% in 2000
US average: 27.9%
High school or higher
92.9%
+1.1 ptssince 2000
from 91.8% in 2000
US average: 84.9%
Graduate degree
13.7%
+1.6 ptssince 2000
from 12.1% in 2000
US average: 10.2%
Section 06

Commute & transportation

Average commute
25.9 min
+40%since 2000
from 18.5 min in 2000
US average: 25.2
Drive alone to work
77.5%
−0.3 ptssince 2009
from 77.9% in 2009
US average: 76.2%
Carpooled to work
9.1%
Unchangedsince 2009
from 9.1% in 2009
US average: 10.4%
Public transit
3.4%
−0.1 ptssince 2009
from 3.5% in 2009
US average: 4.7%
Worked from home
6.5%
+0.4 ptssince 2009
from 6.1% in 2009
US average: 4.1%
Walked to work
1.6%
Unchangedsince 2009
from 1.7% in 2009
US average: 2.8%
Biked to work
0.6%
Unchangedsince 2009
from 0.5% in 2009
US average: 0.5%
No vehicle available
4.4%
Unchangedsince 2009
from 4.4% in 2009
US average: 8.7%
Section 07

Work & employment

Self-employed
11.4%
+0.2 ptssince 2009
from 11.2% in 2009
US average: 12.9%
Management & professional
42.7%
+1.1 ptssince 2009
from 41.6% in 2009
US average: 35.2%
Section 08

People & community

Male
49.6%
−0.2 ptssince 2009
from 49.8% in 2009
Female
50.4%
+0.2 ptssince 2009
from 50.2% in 2009
Foreign born
6.4%
Unchangedsince 2009
from 6.4% in 2009
US average: 12.8%
Veterans
11.1%
−0.4 ptssince 2009
from 11.5% in 2009
US average: 9.9%
Marital status (2024)
Men 15+
Never married35.2%(86,875)
Married53%(130,913)
Widowed2.2%(5,536)
Divorced9.6%(23,692)
Women 15+
Never married27.9%(68,513)
Married51.7%(126,878)
Widowed6.7%(16,353)
Divorced13.7%(33,584)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09

Health coverage

Showing 2024 (the nearest year with coverage data).

Uninsured
5.3%
−6.1 ptssince 2013
from 11.4% in 2013
US average: 8.4%
Employer-based
63.4%
−0.3 ptssince 2020
from 63.7% in 2020
US average: 54.8%
Direct-purchase
14.1%
−1.2 ptssince 2020
from 15.3% in 2020
US average: 13.8%
Medicare
18.1%
+0.9 ptssince 2020
from 17.2% in 2020
US average: 18.4%
Medicaid
12.8%
−0.4 ptssince 2020
from 13.2% in 2020
US average: 20.9%
VA health care
1.8%
−0.2 ptssince 2020
from 2.0% in 2020
US average: 2.2%
Any private
75.7%
−1.2 ptssince 2020
from 76.9% in 2020
US average: 67.1%
Any public
29.8%
+0.7 ptssince 2020
from 29.1% in 2020
US average: 36.7%

Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.

Section 09 · Service history

Veterans

Veterans by period of service, 2024
Gulf War (2001 or later)24.1%(7,334)
US avg: 26.4%
Gulf War (1990s)22.2%(6,769)
US avg: 24.3%
Vietnam era33.7%(10,271)
US avg: 33.1%
Korean War5.1%(1,554)
US avg: 4.5%
World War II0.5%(158)
US avg: 1%

Share of the 30,483 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.

BAR + DOT: THIS PLACE · TICK: US AVERAGE
Drill deeper

Places similar to Jefferson County

Washington County
Pop 611,708
Johnson County
Pop 636,906
Plymouth County
Pop 546,829
Union County
Pop 601,863
Places similar to Jefferson County
Head to head

Compare Jefferson County to nearby counties

JEFFERSON COUNTY VS
Denver County
Income$94,718+43%
Home value$616,000+138%
Population740,613+28%
SEE FULL COMPARISON →
JEFFERSON COUNTY VS
Clear Creek County
Income$94,577+43%
Home value$608,500+135%
Population8,994−98%
SEE FULL COMPARISON →
JEFFERSON COUNTY VS
Douglas County
Income$149,594+126%
Home value$713,600+175%
Population399,396−31%
SEE FULL COMPARISON →
JEFFERSON COUNTY VS
Gilpin County
Income$95,361+44%
Home value$573,900+121%
Population6,073−99%
SEE FULL COMPARISON →
Frequently asked

How many people live in Jefferson County, Colorado?

Jefferson County, Colorado has about 534,543 residents according to the 2010 American Community Survey.

What is the median household income in Jefferson County, Colorado?

The typical household in Jefferson County, Colorado earns about $66,075 a year. Half of households make more than that, and half make less.

Is Jefferson County, Colorado expensive?

In Jefferson County, Colorado, the median home is worth about $259,300, and the typical rent is about $900 a month.

How educated are people in Jefferson County, Colorado?

About 39.3% of adults age 25 and over in Jefferson County, Colorado hold a bachelor's degree or higher.

What is the poverty rate in Jefferson County, Colorado?

About 8.0% of people in Jefferson County, Colorado live below the federal poverty line.

Has Jefferson County, Colorado grown since 1990?

Yes, Jefferson County, Colorado has grown since 1990. The population has added about 96,113 residents, a change of about 22 percent over that period.

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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

How we source and harmonize this data →