Jefferson County, CO

County

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2024 Population

579,377

US Senator

Michael Bennet

Democratic Party

US Senator

John Hickenlooper

Democratic Party

2024 Median Age

40.5

0.248% 1-year increase

2024 Poverty Rate

6.68%

0.324% 1-year decrease

2024 Median Household Income

$110,656

2.65% 1-year growth

2024 Median Property Value

$637,600

5.49% 1-year growth

2024 Employed Population

323,076

0.229% 1-year growth

About

None of the households in Jefferson County, CO reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.

97.3% of the residents in Jefferson County, CO are U.S. citizens.

The largest universities in Jefferson County, CO are Red Rocks Community College (2,071 degrees awarded in 2023), Colorado School of Mines (1,979 degrees), and Colorado Christian University (1,435 degrees).

In 2024, the median property value in Jefferson County, CO was $637,600, and the homeownership rate was 70.7%.

Most people in Jefferson County, CO drove alone to work, and the average commute time was 26 minutes. The average car ownership in Jefferson County, CO was 2 cars per household.

Jefferson County, CO borders Adams County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Clear Creek County, CO, Denver County, CO, Douglas County, CO, Gilpin County, CO, Park County, CO, and Teller County, CO.

Photo by Kent Kanouse

United States Colorado Denver-Aurora-Lakewood, CO

Population & Diversity

Jefferson County, CO is home to a population of 579k people, from which 97.3% are citizens. As of 2024, 6.28% of Jefferson County, CO residents were born outside of the country (36.4k people).

In 2024, there were 9.79 times more White (Non-Hispanic) residents (436k people) in Jefferson County, CO than any other race or ethnicity. There were 44.5k Two Races Including Other (Hispanic) and 24.6k White (Hispanic) residents, the second and third most common ethnic groups.

Population & Diversity

Citizenship

97.3%

2024 Citizenship

97.4%

2023 Citizenship

As of 2024, 97.3% of Jefferson County, CO residents were US citizens, which is higher than the national average of 93.2%. In 2023, the percentage of US citizens in Jefferson County, CO was 97.4%, meaning that the rate of citizenship has been decreasing.

The following chart shows US citizenship percentages in Jefferson County, CO compared to that of it's neighboring and parent geographies.

Diversity

Race and Ethnicity

The 3 largest ethnic groups in Jefferson County, CO

White (Non-Hispanic)
436k ± 890
Two Races Including Other (Hispanic)
44.5k ± 2.03k
White (Hispanic)
24.6k ± 1.96k

16.1%

Hispanic Population

93.3k people

16.1% of the people in Jefferson County, CO are hispanic (93.3k people).

The following chart shows the 8 races represented in Jefferson County, CO as a share of the total population.

Global Diversity

The PUMS dataset is not available at the County level, so we are showing data for Colorado.

Most Common Origin

Mexico
203,143 ± 10,870 people
India
22,453 ± 3,672 people
China
17,281 ± 3,223 people

In 2023, the most common birthplace for the foreign-born residents of Colorado was Mexico, the natal country of 203,143 Colorado residents, followed by India with 22,453 and China with 17,281.

Foreign-Born Population

6.28%

2024 Foreign-Born Population

36.4k people

6.08%

2023 Foreign-Born Population

35.3k people

As of 2024, 6.28% of Jefferson County, CO residents (36.4k people) were born outside of the United States, which is approximately the same as the national average of 14%. In 2023, the percentage of foreign-born citizens in Jefferson County, CO was 6.08%, meaning that the rate has been increasing.

The following chart shows the percentage of foreign-born residents in Jefferson County, CO compared to that of it's neighboring and parent geographies.

Military

Veterans

Most Common Service Period

Vietnam
9,901 ± 649
Gulf War (2001-)
7,334 ± 778
Gulf War (1990s)
4,494 ± 524

Jefferson County, CO has a large population of military personnel who served in Vietnam, 1.35 times greater than any other conflict.

The chart shows the distribution of veterans by conflict in Jefferson County, CO.

Economy

The economy of Jefferson County, CO employs 323k people. In 2024, the largest industries in Jefferson County, CO were Professional, Scientific, & Technical Services (46,845 people), Health Care & Social Assistance (38,461 people), and Retail Trade (32,124 people), and the highest paying industries were Management of Companies & Enterprises ($151,625), Mining, Quarrying, & Oil & Gas Extraction ($125,759), and Utilities ($102,710).

Employment

Occupations

323k

2024 Value

± 4,313

0.229%

1 Year growth

± 1.9%

From 2023 to 2024, employment in Jefferson County, CO grew at a rate of 0.229%, from 322k employees to 323k employees.

The most common job groups, by number of people living in Jefferson County, CO, are Management Occupations (49,611 people), Sales & Related Occupations (30,814 people), and Office & Administrative Support Occupations (29,537 people). This chart illustrates the share breakdown of the primary jobs held by residents of Jefferson County, CO.

Unemployment Insurance Claims

Data is only available at the state level. Showing data for Colorado.

This chart shows weekly unemployment insurance claims in Colorado (not-seasonally adjusted) compared with the four states with the most similar impact.

The most recent data point uses Advance State Claims data, which can be revised in subsequent weeks.

Industries

Employment by Industries

323k

2024 Value

± 4,313

0.229%

1 Year growth

± 1.9%

From 2023 to 2024, employment in Jefferson County, CO grew at a rate of 0.229%, from 322k employees to 323k employees.

The most common employment sectors for those who live in Jefferson County, CO, are Professional, Scientific, & Technical Services (46,845 people), Health Care & Social Assistance (38,461 people), and Retail Trade (32,124 people). This chart shows the share breakdown of the primary industries for residents of Jefferson County, CO, though some of these residents may live in Jefferson County, CO and work somewhere else. Census data is tagged to a residential address, not a work address.

Median Earnings by Industry

$74,810

Median earning men ± $1,244

$56,002

Median earning women ± $1,260

The industries with the best median earnings for men in 2024 are Public Administration ($104,500), Professional, Scientific, & Management, & Administrative & Waste Management Services ($101,835), and Finance & Insurance, & Real Estate & Rental & Leasing ($101,385).

The industries with the best median earnings for women in 2024 are Agriculture, Forestry, Fishing & Hunting, & Mining ($83,649), Public Administration ($78,986), and Manufacturing ($78,715).

Employment by Industry Sector

Data is only available at the state level. Showing data for Colorado.

Y-Axis

1.73%

Year-over-year growth

Employment change between February 2022 and February 2023

As of February 2023, there are 2.87M people employed in Colorado. This represents a 1.73% increase in employment when compared to February 2022.

Right after the beginning of the COVID-19 pandemic, during April 2020, a general dip can be seen across industry sectors, resulting in an overall decline in employment by 11.9%.

The following chart shows monthly employment numbers for each industry sector in Colorado.

Establishments by Size

The industries with the most establishments

2,591
Professional, Scientific, and Technical Services
1,513
Construction
1,162
Real Estate and Rental and Leasing

The visualization shows the distribution of establishments by industry and by size according to the number of employees.

The visualization shows the number of establishments and its share across establishment sizes.

Payroll by Industry Sector

The industries with the highest total annual payroll

$2.48M
Professional, Scientific, and Technical Services
$1.55M
Health Care and Social Assistance
$1.15M
Retail Trade

The chart shows the total annual payroll and the average annual payroll by industry.

Civics

In the 2024 presidential election, the popular vote in Colorado went to Kamala Harris with 54.1% of the vote. The runner-up was Donald J. Trump (43.1%), followed by Robert Kennedy (1.12%).

Michael Bennet and John Hickenlooper are the senators currently representing the state of Colorado. In the United States, senators are elected to 6-year terms with the terms for individual senators staggered.

Colorado is currently represented by 8 members in the U.S. house, and members of the House of Representives are elected to 2-year terms.

Presidential Elections

Presidential Popular Vote Over Time

Voting results are not available for Jefferson County, CO. Showing the available data for Colorado.

2024 Election Results

Kamala Harris (54.1%)
Democratic Party
Donald J. Trump (43.1%)
Republican Party
Robert Kennedy (1.12%)
Independent Party

In the 2024 presidential election, the popular vote in Colorado went to Kamala Harris with 54.1% of the vote. The runner-up was Donald J. Trump (43.1%), followed by Robert Kennedy (1.12%).

The following chart shows the popular vote results in Colorado for each registered party from 1976 to 2024.

Senator Elections

US Senators from Colorado

Senatorial voting results are only available at the state level. Showing data for Colorado.

Michael Bennet

Senator from Colorado

Assumed office on January 21, 2009
Appointed to the seat following the resignation of Ken Salazar, who had become Secretary of the Interior.

John Hickenlooper

Senator from Colorado

Assumed office on January 3, 2021

Michael Bennet and John Hickenlooper are the senators currently representing Colorado.

In the United States, senators are elected to 6-year terms with the terms for individual senators staggered.

The following chart shows elected senators in Colorado over time, excluding special elections, colored by their political party.

Education

In 2023, universities in Jefferson County, CO awarded 6,209 degrees. The student population of Jefferson County, CO in 2023 is skewed towards women, with 11,899 male students and 13,782 female students.

Most students graduating from Universities in Jefferson County, CO are White (4,098 and 68.7%), Hispanic or Latino (942 and 15.8%), Unknown (279 and 4.67%), and Two or More Races (225 and 3.77%).

The largest universities in Jefferson County, CO by number of degrees awarded are Red Rocks Community College (2,071 and 33.4%), Colorado School of Mines (1,979 and 31.9%), and Colorado Christian University (1,435 and 23.1%).

The most popular majors in Jefferson County, CO are Mechanical Engineering (383 and 6.17%), Computer Science (299 and 4.82%), and General Business Administration & Management (286 and 4.61%).

The median tuition costs in Jefferson County, CO are $26,668 for private four year colleges, and $11,163 and $28,878 respectively, for public four year colleges for in-state students and out-of-state students.

Admissions & Enrollments

Applicants, Admissions & Enrolled

University

Measure

In 2023 in Jefferson County, CO, the percentage of applicants admitted was 59.8%, while the percentage of admitted who enrolled was 24.9%. The number of students enrolled in 2023 was 25,681 (46.3% men and 53.7% women).

The line chart shows the evolution of the percentage of applicants admitted, admitted who enrolled or the number of students enrolled according to the option selected in the upper button.

Enrollments by Gender and Races

Universities

In 2023 there were 25,681 students enrolled in Jefferson County, CO, 46.3% men and 53.7% women.

By race, the largest number of students enrolled was concentrated in White with 16,219 records, of which 52.1% were women and 47.9% men.

Completions

Concentrations

Most Common

Computer Science
222 degrees awarded
Chemical Engineering
149 degrees awarded
Mechanical Engineering
321 degrees awarded

In 2023, the most common concentation for Bachelors Degree recipients in Jefferson County, CO was Computer Science with 222 degrees awarded.

This visualization illustrates the percentage of students graduating with a Bachelors Degree from schools in Jefferson County, CO according to their major.

Universities

Gender

Race

Largest Universities by degrees awarded

Red Rocks Community College
2,071 degrees awarded
Colorado School of Mines
1,979 degrees awarded
Colorado Christian University
1,435 degrees awarded

In 2023, the institution with the largest number of graduating students was Red Rocks Community College with 2,071 degrees awarded.

Student Diversity

University

In 2023, 3,128 men were awarded degrees from institutions in Jefferson County, CO, which is 1.02 times more than the 3,081 female students who received degrees in the same year.

In 2023, the most common race/ethnicity group awarded degrees at institutions was White students. These 4,098 degrees mean that there were 4.35 times more degrees awarded to White students then the next closest race/ethnicity group, Hispanic or Latino, with 942 degrees awarded.

Awarded Degrees over Time

The graph shows the evolution of awarded degrees by degrees. Under the paragraphs, the average number of awarded degrees by university in each degree is shown.

Tuition

Average Net Price by Sector

Universities

Private not-for-profit, 4-year or above ($26,668) is the sector with the highest median state tuition in 2023.

Private for-profit, 4-year or above ($2,360) is the sector with the highest median state fee in 2023.

Public, 4-year or above ($1,480) is the sector with the highest average net price of books and supplies.

The graph shows the average net price by sector and year.

Housing & Living

The median property value in Jefferson County, CO was $637,600 in 2024, which is 1.92 times larger than the national average of $332,700. Between 2023 and 2024 the median property value increased from $604,400 to $637,600, a 5.49% increase. The homeownership rate in Jefferson County, CO is 70.7%, which is higher than the national average of 65.2%.

People in Jefferson County, CO have an average commute time of 26 minutes, and they drove alone to work. Car ownership in Jefferson County, CO is approximately the same as the national average, with an average of 2 cars per household.

In 2025, 13.7% of the population was living with severe housing problems in Jefferson County, CO. From 2014 to 2025, the indicator declined 1.01%.

Housing

Property

$637,600

Median Property Value 2024

±$3,257

$170,969

Median Property Taxes

±$2,794

The following chart display owner-occupied housing units distributed between a series of property tax buckets compared to the national averages for each bucket. In Jefferson County, CO the largest share of households pay taxes in the $3k+ range.

The chart underneath the paragraph shows the property taxes in Jefferson County, CO compared to it's parent and neighbor geographies.

Rent vs Own

70.7%

Homeownership

2024

70.3%

Homeowners with Mortgage

2024

In 2024, 70.7% of the housing units in Jefferson County, CO were occupied by their owner. This percentage grew from the previous year's rate of 70.6%.

This chart shows the percentage of owner in Jefferson County, CO compared it's parent and neighboring geographies.

Equity

Household Income

Please note that the buckets used in this visualization were not evenly distributed by ACS when publishing the data.

$110,656

Median Household Income

± $1,614

242k

Number of Households

± 3,662

In 2024, the median household income of the 242k households in Jefferson County, CO grew to $110,656 from the previous year's value of $107,800.

The following chart displays the households in Jefferson County, CO distributed between a series of income buckets compared to the national averages for each bucket. The largest share of households have an income in the $200k+ range.

Wage Distribution

The closest comparable wage GINI for Jefferson County, CO is from Colorado.

0.462

2023 Wage GINI in Colorado

0.464

2022 Wage GINI in Colorado

In 2023, the income inequality in Colorado was 0.462 according to the GINI calculation of the wage distribution. Income inequality had a 0.304% decline from 2022 to 2023, which means that wage distribution grew somewhat more even. The GINI for Colorado was lower than than the national average of 0.476. In other words, wages are distributed more evenly in Colorado in comparison to the national average.

This chart shows the number of workers in Colorado across various wage buckets compared to the national average.

Transportation

Commuter Transportation

Most Common Commute in 2024

Drove Alone (64.4%)
Worked At Home (25.4%)
Carpooled (5.71%)

In 2024, 64.4% of workers in Jefferson County, CO drove alone to work, followed by those who worked at home (25.4%) and those who carpooled to work (5.71%).

The following chart shows the number of households using each mode of transportation over time, using a logarithmic scale on the y-axis to help better show variations in the smaller means of commuting.

Commute Time

26 minutes

Average Travel Time

Using averages, employees in Jefferson County, CO have a shorter commute time (26 minutes) than the normal US worker (26.4 minutes). Additionally, 1.36% of the workforce in Jefferson County, CO have "super commutes" in excess of 90 minutes.

The chart below shows how the median household income in Jefferson County, CO compares to that of it's neighboring and parent geographies.

Car Ownership

2 cars

Average Number

The following chart displays the households in Jefferson County, CO distributed between a series of car ownership buckets compared to the national averages for each bucket. The largest share of households in Jefferson County, CO have 2 cars.

Poverty

Severe Housing Problems

In 2025, 13.7% of the population was living with severe housing problems in Jefferson County, CO. From 2014 to 2025, the indicator declined 1.01%.

The graph shows the trend of the percentage of the population living with severe housing problems.

Poverty & Diversity

6.68% of the population for whom poverty status is determined in Jefferson County, CO (38.2k out of 571k people) live below the poverty line, a number that is lower than the national average of 12.5%. The largest demographic living in poverty are Males 18 - 24, followed by Females 25 - 34 and then Females 18 - 24.

The most common racial or ethnic group living below the poverty line in Jefferson County, CO is White, followed by Hispanic and Two Or More.

The Census Bureau uses a set of money income thresholds that vary by family size and composition to determine who classifies as impoverished. If a family's total income is less than the family's threshold than that family and every individual in it is considered to be living in poverty.

Children in Poverty

In 2025, 7.5% of the children was living in poverty in Jefferson County, CO. From 2014 to 2025, the indicator declined 5.2%.

The graph shows the trend of the percentage of the children living in poverty.

Social Needs

Data only available at the state level.

Most prevalent states

California
35,798 individuals
New York
5,087 individuals
Florida
4,915 individuals

In 2017, California had the highest estimated number of chronically homeless individuals in the nation, at 35,798. New York has the second highest (5,087), followed by Florida (4,915).

The following map shows the estimated number of chronically homeless individuals by state over multiple years.

Security

Crimes & Accidents

Indicator

In 2022, the number of reported violent crimes offenses per 100,000 population was 254 in Jefferson County, CO. From 2014 to 2022, the indicator grew 15.9 per 100,000 population.

The graph shows the trend in the number of reported violent crimes offenses per 100,000 population.

Health

94.7% of the population of Jefferson County, CO has health coverage, with 56.8% on employee plans, 10.4% on Medicaid, 13.9% on Medicare, 12.7% on non-group plans, and 0.962% on military or VA plans.

Primary care physicians in Jefferson County, CO see 1,132 patients per year on average, which represents a 0% change from the previous year (1,132 patients). Compare this to dentists who see 963 patients per year, and mental health providers who see 201 patients per year.

By gender, of the total number of insured persons, 50.2% were men and 49.8% were women.

Coverage

Patient to Clinician Ratios

1,132 to 1

Patient to Primary Care Physician Ratio in Jefferson County, CO

Primary care physicians in Jefferson County, CO see an average of 1,132 patients per year. This represents a 0% change from the previous year (1,132 patients).

The following chart shows how the number of patients seen by primary care physicians has been changing over time in Jefferson County, CO in comparison to its neighboring geographies.

Health Care Diversity

In 2024, insured persons according to age ranges were distributed in 19.7% under 18 years, 21.7% between 18 and 34 years, 40.8% between 35 and 64 years, and 17.7% over 64 years.

By gender, of the total number of insured persons, 50.2% were men and 49.8% were women.

The following chart shows the number of people with health coverage by gender.

Uninsured People

5.26%

Uninsured

56.8%

Employer Coverage

10.4%

Medicaid

13.9%

Medicare

12.7%

Non-Group

0.962%

Military or VA

Between 2023 and 2024, the percent of uninsured citizens in Jefferson County, CO grew by 0.261% from 5.24% to 5.26%.

The following chart shows how the percent of uninsured individuals in Jefferson County, CO changed over time compared with the percent of individuals enrolled in various types of health insurance.

Health Indicators

Health Outcomes

Indicator

In 2025, the number of deaths among residents under age 18 per 100,000 population was 44.4 in Jefferson County, CO.

The graphic shows the trend of the indicator in Jefferson County, CO.

Health Behaviors

Indicator

In 2025, the percentage of the adult population (age 18 and older) that reports a body mass index (BMI) greater than or equal to 30 kg/m2 (age-adjusted) was 24.9% in Jefferson County, CO.

The graphic shows the trend of the indicator in Jefferson County, CO.