Jefferson County, Colorado Population 2023

597,421

Jefferson County, Colorado's estimated 2023 population is 597,421 with a growth rate of 0.82% in the past year according to the most recent United States census data. Jefferson County, Colorado is the 4th largest county in Colorado. The 2010 population was 534,543 and has seen a growth of 11.76% since that time.

Note: data after 2021 is projected based on recent change
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Jefferson County, Colorado Population 2023

Population by Race

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White

Two or more races

Asian

Other race

Black or African American

Native American

Native Hawaiian or Pacific Islander

Jefferson County, Colorado Population by Race

Jefferson County, Colorado Population Pyramid 2023

Jefferson County, Colorado Median Age

40.2

Total

39

Male

41.5

Female

Jefferson County, Colorado Adults

There are 464,781 adults, (95,286 of whom are seniors) in Jefferson County, Colorado.

Jefferson County, Colorado Age Dependency

56.6

Age Dependency Ratio

25.8

Old Age Dependency Ratio

30.9

Child Dependency Ratio

Jefferson County, Colorado Sex Ratio

Female290,02650.11%
Male288,76949.89%

Jefferson County, Colorado Population by Age

Jefferson County, Colorado Renter vs Owner Occupied by Household Type

3.03

Average Family Size

2.49

Average Household Size

71.7%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Jefferson County, Colorado Households and Families

Male

Female

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Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

Jefferson County, Colorado Educational Attainment by Sex (over 25)

Jefferson County, Colorado Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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The highest rate of high school graduation is among islander people with a rate of 93.43%.

The highest rate of bachelors degrees is among white people with a rate of 44.44%.

Jefferson County, Colorado Educational Attainment by Race

All

Male

Female

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$51,261

Average Earnings

$60,123

Average Male

$43,138

Average Female

Jefferson County, Colorado Earnings by Educational Attainment

Jefferson County, Colorado Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Jefferson County, Colorado Language

89.66% of Jefferson County, Colorado residents speak only English, while 10.34% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 6.04% of the population.

Jefferson County, Colorado Language

Jefferson County, Colorado Poverty by Race

rate

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7.9%

Overall Poverty Rate

6.39%

Male Poverty Rate

7.07%

Female Poverty Rate

Poverty in Jefferson County, Colorado

The race most likely to be in poverty in Jefferson County, Colorado is Hispanic, with 15.63% below the poverty level.

The race least likely to be in poverty in Jefferson County, Colorado is White, with 6.27% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.23%. Among those working part-time, it was 10.05%, and for those that did not work, the poverty rate was 13.25%.

Jefferson County, Colorado Poverty

rate

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Jefferson County, Colorado Poverty Rate by Education

rate

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Jefferson County, Colorado Poverty Rate by Employment Status and Sex

Jefferson County, Colorado Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

Jefferson County, Colorado Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

51.7%

Overall Marriage Rate

52.1%

Male Marriage Rate

51.2%

Female Marriage Rate

Jefferson County, Colorado Married by Age and Sex

male

female

Jefferson County, Colorado Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 35-44.

Jefferson County, Colorado Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Jefferson County, Colorado Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

35,879

Number of Veterans

32,824

Male Veterans

3,055

Female Veterans

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Jefferson County, Colorado Veterans by War

count

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Jefferson County, Colorado Veterans by Age

count

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Jefferson County, Colorado Veterans by Race

Jefferson County, Colorado Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

4.75%

Veteran Poverty Rate

23.1%

Veteran Disability Rate

Jefferson County, Colorado Veterans by Education

LaborForceParticipation

69.2%

Labor Force Participation

66.4%

Employment Rate

4%

Unemployment Rate

Jefferson County, Colorado Employment by Age

LaborForceParticipation

Jefferson County, Colorado Employment by Race

LaborForceParticipation

Jefferson County, Colorado Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

45.58%

Born in Jefferson County, Colorado

93.09%

Native Born

6.2%

Foreign Born

2.89%

Non Citizen

3.31%

Naturalized

Place of Birth

93.09% of Jefferson County, Colorado residents were born in the United States, with 45.58% having been born in Colorado. 2.89% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Jefferson County, Colorado Place of Birth

Sources