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COUNTY · 2000 CENSUS

Jefferson County

Colorado · 527,056 residents · 764.383 sq mi
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The short version

Jefferson County is significantly wealthier than the US average, with a median household income of $57,339. Population has grown 20% since 1990. 37% of adults hold a bachelor's degree or higher, well above the national rate of 24%. Median home value has more than doubled since 1990, reaching $184,200. Poverty is rare here, at 5.2% of residents.

At a glance
Wealthier
above the US median
US median: $42,589
Mid-age
median age 36.8
US median: 35.2
More educated
37% hold a bachelor's degree
US average: 24%
Less affordable
home values up 50%, inflation adjusted
US median home: $120,530
Section 01

Population & growth

Total population
527,056
+20%since 1990
from 438,430 in 1990
1990 – 2025
Median age
36.8
+10%since 1990
from 33.4 in 1990
US average: 35.2
Population, 1990 – 2024
424K467K511K554K597K1990201020202024Jefferson County
2024579K
1990201020202024
Age distribution, 2000
Under 56.3%(33,280)
US avg: 6.8%
5 to 97%(36,941)
US avg: 7.3%
10 to 147.5%(39,634)
US avg: 7.3%
15 to 197%(36,700)
US avg: 7.2%
20 to 245.6%(29,534)
US avg: 6.7%
25 to 3413.6%(71,650)
US avg: 14.2%
35 to 4418.5%(97,374)
US avg: 16%
45 to 5416.1%(84,675)
US avg: 13.4%
55 to 648.8%(46,442)
US avg: 8.6%
65 to 745.4%(28,352)
US avg: 6.5%
75 to 843.2%(16,857)
US avg: 4.4%
85 and over1.1%(5,617)
US avg: 1.5%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02

Income & economy

Median household income
$57,339
+11%inflation adjusted, since 1990
from $39,084 in 1990
US average: $42,589
1990 – 2024
Per capita income
$28,066
+62%since 1990
from $17,310 in 1990
US average: $21,522
Poverty rate
5.2%
−0.6 ptssince 1990
from 5.8% in 1990
US average: 12.4%
Section 03

Housing

Median home value
$184,200
+50%inflation adjusted, since 1990
from $93,400 in 1990
US average: $120,530
1990 – 2024
Median gross rent
$760
+21%inflation adjusted, since 1990
from $476 in 1990
US average: $602
Owner-occupied
72.5%
+2.4 ptssince 1990
from 70.1% in 1990
27.5% rent
RELATED:See current rent listings in Jefferson County on RentDataNow
Section 04

Race & ethnicity

1990
White, non-Hispanic94.8%(415,474)
Black0.6%(2,721)
Hispanic / Latino6.8%(29,615)
Asian1.7%(7,613)
2000
White, non-Hispanic84.9%(447,416)
Black0.8%(4,312)
Hispanic / Latino10%(52,449)
Asian2.2%(11,855)

No data for the years selected.

Section 04 · Origins

Detailed origins & ancestry

Detailed origin tables are available for 2024; showing 2024 data.

Hispanic origin
Mexican10.7%(61,938)
Spaniard1%(6,061)
South American0.9%(5,048)
Central American0.5%(3,124)
Puerto Rican0.4%(2,472)
Cuban0.3%(1,554)
Venezuelan0.2%(1,307)
Peruvian0.2%(1,009)
Colombian0.2%(953)
Guatemalan0.1%(831)
Costa Rican0.1%(693)
Salvadoran0.1%(676)
+ 10 more hispanic origin groups with data
Chilean0.1%(509)
Nicaraguan0.1%(389)
Honduran0.1%(377)
Bolivian0.1%(370)
Ecuadorian0.1%(366)
Argentine0%(277)
Dominican0%(183)
Uruguayan0%(139)
Panamanian0%(135)
Asian origin
Vietnamese0.6%(3,708)
Chinese0.6%(3,189)
Asian Indian0.4%(2,203)
Korean0.3%(1,834)
Filipino0.2%(1,435)
Japanese0.2%(1,350)
Nepalese0.1%(459)
Hmong0%(264)
Pakistani0%(252)
Taiwanese0%(244)
Thai0%(222)
Cambodian0%(149)
+ 9 more asian origin groups with data
Kazakh0%(140)
Laotian0%(128)
Mongolian0%(89)
Mien0%(34)
Burmese0%(28)
Okinawan0%(10)
Pacific Islander origin
Samoan0.1%(317)
Chamorro0%(83)
Tongan0%(16)
Ancestry
German21%(121,840)
English14.7%(85,053)
Irish13.4%(77,379)
Italian6.5%(37,763)
American3.4%(19,457)
Polish3.2%(18,385)
Scottish2.8%(16,454)
French2.4%(14,008)
Norwegian2.4%(13,966)
Swedish2.4%(13,860)
Dutch1.7%(9,922)
Scotch-Irish1.2%(6,788)
+ 47 more ancestry groups with data
Welsh1%(5,524)
Russian0.9%(5,432)
Czech0.9%(5,091)
Danish0.8%(4,770)
British0.7%(3,781)
Arab0.5%(2,900)
Hungarian0.4%(2,445)
Swiss0.4%(2,388)
French Canadian0.4%(2,355)
Ukrainian0.4%(2,283)
Greek0.4%(2,190)
Austrian0.3%(1,929)
Portuguese0.3%(1,722)
Finnish0.3%(1,528)
Lithuanian0.2%(1,189)
Slovak0.2%(986)
Canadian0.2%(952)
Romanian0.2%(910)
Croatian0.2%(891)
Lebanese0.1%(774)
Slovene0.1%(734)
Belgian0.1%(677)
West Indian0.1%(633)
Brazilian0.1%(569)
Iranian0.1%(533)
Serbian0.1%(469)
Armenian0.1%(422)
Syrian0.1%(375)
Australian0.1%(320)
Nigerian0.1%(309)
Palestinian0.1%(297)
Jordanian0%(281)
Jamaican0%(265)
Bulgarian0%(243)
Turkish0%(223)
Ethiopian0%(199)
Latvian0%(187)
Egyptian0%(158)
Moroccan0%(153)
Israeli0%(122)
Haitian0%(83)
Barbadian0%(73)
Iraqi0%(30)
Kenyan0%(14)
RANKED:Largest German population · Largest English population · Largest Irish population · Largest Mexican population · Largest Italian population
Section 05

Education

Bachelor's degree or higher
36.5%
+5.8 ptssince 1990
from 30.7% in 1990
US average: 24.4%
High school or higher
91.8%
+2.0 ptssince 1990
from 89.8% in 1990
US average: 80.3%
Graduate degree
12.1%
+2.5 ptssince 1990
from 9.5% in 1990
US average: 8.8%
Section 06

Commute & transportation

Average commute
18.5 min
−23%since 1990
from 24.0 min in 1990
US average: 17.6
Section 07

Work & employment

No data for the years selected.

Section 08

People & community

No data for the years selected.

Marital status
Men 15+
Never married27.7%(57,124)
Married60.3%(124,264)
Widowed1.8%(3,763)
Divorced10.1%(20,860)
Women 15+
Never married21.5%(45,469)
Married58.4%(123,615)
Widowed6.9%(14,623)
Divorced13.1%(27,802)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2000
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+65%
Home value$616,000+234%
Population740,613+28%
SEE FULL COMPARISON →
JEFFERSON COUNTY VS
Clear Creek County
Income$94,577+65%
Home value$608,500+230%
Population8,994−98%
SEE FULL COMPARISON →
JEFFERSON COUNTY VS
Douglas County
Income$149,594+161%
Home value$713,600+287%
Population399,396−31%
SEE FULL COMPARISON →
JEFFERSON COUNTY VS
Gilpin County
Income$95,361+66%
Home value$573,900+212%
Population6,073−99%
SEE FULL COMPARISON →
Frequently asked

How many people live in Jefferson County, Colorado?

Jefferson County, Colorado has about 527,056 residents according to the 2000 Census.

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

The typical household in Jefferson County, Colorado earns about $57,339 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 $184,200, and the typical rent is about $760 a month.

How educated are people in Jefferson County, Colorado?

About 36.5% 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 5.2% 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 88,626 residents, a change of about 20 percent over that period.

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Explore from here

146 census tracts (top 20 by population)
Census Tract 605.01Census Tract 98.37Census Tract 117.24Census Tract 102.09Census Tract 103.08Census Tract 118.03Census Tract 604Census Tract 120.57Census Tract 120.43Census Tract 110Census Tract 120.45Census Tract 120.52Census Tract 120.24Census Tract 98.33Census Tract 98.27Census Tract 104.02Census Tract 120.22Census Tract 102.08Census Tract 104.03Census Tract 109.01
27 ZIP codes
ZIP 80123ZIP 80401ZIP 80127ZIP 80128ZIP 80021ZIP 80003ZIP 80228ZIP 80227ZIP 80004ZIP 80226ZIP 80005ZIP 80214ZIP 80033ZIP 80232ZIP 80002ZIP 80403ZIP 80215ZIP 80007ZIP 80465ZIP 80235ZIP 80433ZIP 80470ZIP 80454ZIP 80453ZIP 80457ZIP 80425ZIP 80419
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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

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