Jefferson County, Colorado Population 2021

Jefferson County, Colorado's estimated population is 589,859 with a growth rate of 0.60% in the past year according to the most recent United States census data. Jefferson County, Colorado is the null largest county in Colorado. The 2010 Population was 535,548 and has seen a growth of 10.14% since this time.

Note: 2020 and 2021 data is projected
Year Population Growth Growth Rate
2021589,8593,4890.60%
2020586,3703,4890.60%
2019582,8813,4890.60%
2018579,3923,9750.69%
2017575,4174,0040.70%
2016571,4136,5251.16%
2015564,8886,0691.09%
2014558,8196,7881.23%
2013552,0315,4290.99%
2012546,6026,0961.13%
2011540,5064,9580.93%
2010535,54897,11822.15%
1990438,43066,67717.94%
1980371,753138,72259.53%
1970233,031105,51182.74%
1960127,52071,833128.99%
195055,68724,96281.24%
194030,7258,91540.88%
193021,8107,41051.46%
192014,4001691.19%
191014,2314,92552.92%
19009,30685610.13%
18908,4501,64624.19%
18806,8044,414184.69%
18702,3900.00%
2021 Growth Rate
0.60%
County Website
Founded
November 1, 1861
County Seat
2010 Population
535,548
Growth Since 2010
10.14%
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Jefferson County, Colorado Population Growth

Population by Race

Race Population Percentage
White520,61990.57%
Asian16,2562.83%
Two or More Races16,1362.81%
Some Other Race10,6531.85%
Black or African American6,8391.19%
American Indian and Alaska Native3,9740.69%
Native Hawaiian and Other Pacific Islander3210.06%
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Jefferson County, Colorado Population By Race

Jefferson County, Colorado Population Pyramid 2021

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Jefferson County, Colorado Median Age

40.3


Total

39


Male

41.8


Female

Jefferson County, Colorado Adults

There are 459,719 adults, (91,969 of whom are seniors) in Jefferson County, Colorado.

Jefferson County, Colorado Age Dependency

56.3

Age Dependency Ratio

25

Old Age Dependency Ratio

31.3

Child Dependency Ratio

Jefferson County, Colorado Sex Ratio

Mujer

288,386

50.17%

Masculino

286,412

49.83%

Jefferson County, Colorado Population by Age

Jefferson County, Colorado Renter vs Owner Occupied by Household Type

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Jefferson County, Colorado Household Types

Type Owner Renter
Married85.2%14.8%
All70.7%29.3%
Mujer57.9%42.1%
Masculino55.5%44.5%
Non Family55.1%44.9%

70.7%

Rate of Home Ownership

Jefferson County, Colorado Households and Families

Type Count Average Size Owned
All232,2842.4470.7
Married118,2713.0385.2
Non Family82,8661.3555.1
Mujer20,6363.0757.9
Masculino10,5113.0655.5

2.96

Average Family Size

2.44

Average Household Size

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Jefferson County, Colorado Households by Type

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Education Attained Count Percentage
Less Than 9th Grade6,9571.68%
9th to 12th Grade15,7933.81%
High School Graduate84,16020.29%
Some College88,07621.23%
Associates Degree32,4527.82%
Bachelors Degree119,24228.75%
Graduate Degree68,14516.43%
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Jefferson County, Colorado Educational Attainment by Sex (over 25)

Jefferson County, Colorado Educational Attainment by Race

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Race Total High School Bachelors
White338,715327,916165,510
Hispanic52,57242,79611,250
Asian11,76710,4856,085
2+ Races7,2626,7943,100
Other Race6,9715,6981,399
Black4,4634,1391,590
Native American2,6782,173449
Islander26326370

The highest rate of high school graduation is among islander people with a rate of 100.00%.

The highest rate of bachelors degrees is among asian people with a rate of 51.71%.

Jefferson County, Colorado Educational Attainment by Race

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Name Average Masculino Mujer
Overall$49,723$57,655$41,768
Less Than 9th Grade$29,957$33,217$19,209
High School Graduate$38,468$44,164$31,950
Some College$42,541$50,516$36,001
Bachelors Degree$60,951$75,832$48,250
Graduate Degree$73,402$90,169$62,202

$49,723

Average Earnings

$57,655

Average Male

$41,768

Average Female

Jefferson County, Colorado Earnings by Educational Attainment

Jefferson County, Colorado Language by Age

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Jefferson County, Colorado Language

89.43% of Jefferson County, Colorado residents speak only English, while 10.57% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 6.27% of the population.

Jefferson County, Colorado Language

Jefferson County, Colorado Poverty by Race

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Name Total In Poverty Poverty Rate
White442,57025,1465.68%
Hispanic86,56310,89712.59%
Multiple15,9201,88211.82%
Asian16,1441,71110.60%
Other10,4051,29712.47%
Black6,30589414.18%
Native3,5773128.72%
Islander321113.43%

7.10%

Overall Poverty Rate

6.57%

Male Poverty Rate

7.61%

Female Poverty Rate

Poverty in Jefferson County, Colorado

The race most likely to be in poverty in Jefferson County, Colorado is Black, with 14.18% below the poverty level.

The race least likely to be in poverty in Jefferson County, Colorado is Islander, with 3.43% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.30%. Among those working part-time, it was 10.60%, and for those that did not work, the poverty rate was 13.52%.

Jefferson County, Colorado Poverty

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Name Poverty
Less Than 9th Grade17.02%
High School8.45%
Some College6.21%
Bachelors or Greater3.15%

Jefferson County, Colorado Poverty Rate by Education

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Name Poverty
Female Unemployed25.87%
Male Unemployed17.36%
Female Employed4.06%
Male Employed3.13%

Jefferson County, Colorado Poverty Rate by Employment Status and Sex

Jefferson County, Colorado Income by Household Type

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Name Median Mean
Households$82,986$107,456
Families$104,183$127,486
Married Families$115,930$140,470
Non Families$51,022$67,240
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Income by Household Type

Jefferson County, Colorado Marital Status

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Marriage Rates

52.2%

Overall Marriage Rate

52.7%

Male Marriage Rate

51.8%

Female Marriage Rate

Jefferson County, Colorado Married by Age and Sex

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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

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Jefferson County, Colorado Marital Status

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37,469

Number of Veterans

34,064

Male Veterans

3,405

Female Veterans

War Veterans
Vietnam14,096
Second Gulf War7,315
First Gulf War6,727
Korea2,786
World War II1,133

Jefferson County, Colorado Veterans by War

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Age Group Veterans
65 to 7410,535
35 to 548,641
75+8,288
55 to 646,112
18 to 343,893

Jefferson County, Colorado Veterans by Age

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Name Veterans % of Total
White35,1218.36%
Hispanic3,1935.12%
2+ Races5866.39%
Other Race5396.45%
Black52910.04%
Native American34510.67%
Asian3332.52%
Islander165.37%

Jefferson County, Colorado Veterans by Race

Jefferson County, Colorado Veterans by Education

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4.98%

Veteran Poverty Rate

24.36%

Veteran Disability Rate

Jefferson County, Colorado Veterans by Education

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69.4%

Labor Force Participation

66.8%

Employment Rate

3.6%

Unemployment Rate

Jefferson County, Colorado Employment by Age

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Jefferson County, Colorado Employment by Race

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Jefferson County, Colorado Employment by Education

Origin of Non-Citizens

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

Origin of Naturalized Citizens

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46.00%

Born in Jefferson County, Colorado

93.60%

Native Born

6.40%

Foreign Born

2.92%

Non Citizen

3.48%

Naturalized

Place of Birth

93.60% of Jefferson County, Colorado residents were born in the United States, with 46.00% having been born in Colorado. 2.92% 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

  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990

Sources