Boulder County, Colorado Population 2021

Boulder County, Colorado's estimated population is 329,316 with a growth rate of 0.48% in the past year according to the most recent United States census data. Boulder County, Colorado is the 9th largest county in Colorado. The 2010 Population was 295,037 and has seen a growth of 11.62% since this time.

Note: 2020 and 2021 data is projected
Year Population Growth Growth Rate
2021329,3161,5600.48%
2020327,7561,5600.48%
2019326,1961,5600.48%
2018324,6362,1950.68%
2017322,4411,1910.37%
2016321,2503,2231.01%
2015318,0275,7941.86%
2014312,2332,9100.94%
2013309,3234,7531.56%
2012304,5704,6131.54%
2011299,9574,9201.67%
2010295,03769,69830.93%
1990225,33935,71418.83%
1980189,62557,73643.78%
1970131,88957,63577.62%
196074,25425,95853.75%
195048,29610,85829.00%
194037,4384,98215.35%
193032,4565951.87%
192031,8611,5315.05%
191030,3308,78640.78%
190021,5447,46252.99%
189014,0824,35944.83%
18809,7237,784401.44%
18701,9390.00%
2021 Growth Rate
0.48%
County Website
Founded
November 1, 1861
County Seat
2010 Population
295,037
Growth Since 2010
11.62%
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Boulder County, Colorado Population Growth

Population by Race

Race Population Percentage
White286,95088.97%
Asian15,2814.74%
Two or More Races9,7823.03%
Some Other Race5,9341.84%
Black or African American2,9440.91%
American Indian and Alaska Native1,4160.44%
Native Hawaiian and Other Pacific Islander2030.06%
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Boulder County, Colorado Population by Race

Boulder County, Colorado Population Pyramid $2021

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Boulder County, Colorado Median Age

36.6


Total

35.1


Male

38.1


Female

Boulder County, Colorado Adults

There are 260,064 adults, (44,094 of whom are seniors) in Boulder County, Colorado.

Boulder County, Colorado Age Dependency

49.3

Age Dependency Ratio

20.4

Old Age Dependency Ratio

28.9

Child Dependency Ratio

Boulder County, Colorado Sex Ratio

Female

160,299

49.70%

Male

162,211

50.30%

Boulder County, Colorado Population by Age

Boulder County, Colorado Renter vs Owner Occupied by Household Type

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Boulder County, Colorado Household Types

Type Owner Renter
Married80.9%19.1%
All62.2%37.8%
Male54%46%
Female50.8%49.2%
Non Family44.3%55.7%

62.2%

Rate of Home Ownership

Boulder County, Colorado Households and Families

Type Count Average Size Owned
All127,4152.4462.2
Married59,3923.0780.9
Non Family53,6021.5344.3
Female9,8993.2750.8
Male4,5223.1454

3.01

Average Family Size

2.44

Average Household Size

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Boulder County, Colorado Households by Type

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Education Attained Count Percentage
Less Than 9th Grade4,3452.04%
9th to 12th Grade6,2512.94%
High School Graduate24,91611.71%
Some College32,12715.10%
Associates Degree13,0456.13%
Bachelors Degree72,26233.96%
Graduate Degree59,80928.11%
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Boulder County, Colorado Educational Attainment by Sex (over 25)

Boulder County, Colorado Educational Attainment by Race

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Race Total High School Bachelors
White173,954171,020115,725
Hispanic23,04916,4986,103
Asian9,6939,0887,026
2+ Races4,2243,8132,537
Other Race3,3972,322814
Black1,8411,617561
Native American913772220
Islander14314377

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 72.49%.

Boulder County, Colorado Educational Attainment by Race

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Name Average Male Female
Overall$50,451$61,761$39,396
Less Than 9th Grade$27,391$31,384$24,024
High School Graduate$31,791$37,109$25,572
Some College$36,837$42,549$31,655
Bachelors Degree$55,456$73,854$43,735
Graduate Degree$73,007$101,277$53,966

$50,451

Average Earnings

$61,761

Average Male

$39,396

Average Female

Boulder County, Colorado Earnings by Educational Attainment

Boulder County, Colorado Language by Age

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Boulder County, Colorado Language

84.34% of Boulder County, Colorado residents speak only English, while 15.66% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 8.72% of the population.

Boulder County, Colorado Language

Boulder County, Colorado Poverty by Race

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Name Total In Poverty Poverty Rate
White241,86525,67510.62%
Hispanic43,1237,33617.01%
Asian14,0051,55011.07%
Multiple9,5021,31313.82%
Other5,9341,10118.55%
Black2,71860722.33%
Native1,37922015.95%
Islander1633320.25%

11.70%

Overall Poverty Rate

11.37%

Male Poverty Rate

12.03%

Female Poverty Rate

Poverty in Boulder County, Colorado

The race most likely to be in poverty in Boulder County, Colorado is Black, with 22.33% below the poverty level.

The race least likely to be in poverty in Boulder County, Colorado is White, with 10.62% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.80%. Among those working part-time, it was 21.33%, and for those that did not work, the poverty rate was 18.96%.

Boulder County, Colorado Poverty

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Name Poverty
Less Than 9th Grade17.41%
High School11.43%
Some College9.14%
Bachelors or Greater4.54%

Boulder County, Colorado Poverty Rate by Education

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Rate Poverty
Male Unemployed31.44%
Female Unemployed23.62%
Female Employed9.42%
Male Employed5.94%

Boulder County, Colorado Poverty Rate by Employment Status and Sex

Boulder County, Colorado Income by Household Type

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Name Median Mean
Households$83,019$115,966
Families$112,815$147,486
Married Families$127,633$161,912
Non Families$48,559$69,245
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Income by Household Type

Boulder County, Colorado Marital Status

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Marriage Rates

46.2%

Overall Marriage Rate

46.1%

Male Marriage Rate

46.4%

Female Marriage Rate

Boulder County, Colorado Married by Age and Sex

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Boulder County, Colorado Marriage

The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 35-44.

Boulder County, Colorado Marital Status by Race

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Boulder County, Colorado Marital Status

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13,779

Number of Veterans

12,643

Male Veterans

1,136

Female Veterans

War Veterans
Vietnam4,901
First Gulf War2,441
Second Gulf War2,272
Korea1,228
World War II693

Boulder County, Colorado Veterans by War

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Age Group Veterans
75+3,701
65 to 743,674
35 to 543,097
55 to 642,066
18 to 341,241

Boulder County, Colorado Veterans by Age

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Name Veterans % of Total
White12,9535.55%
Hispanic9483.17%
2+ Races2854.68%
Asian1751.40%
Other Race1633.68%
Black1516.11%
Native American363.29%
Islander167.88%

Boulder County, Colorado Veterans by Race

Boulder County, Colorado Veterans by Education

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7.42%

Veteran Poverty Rate

24.44%

Veteran Disability Rate

Boulder County, Colorado Veterans by Education

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68.6%

Labor Force Participation

65.7%

Employment Rate

4.2%

Unemployment Rate

Boulder County, Colorado Employment by Age

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Boulder County, Colorado Employment by Race

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Boulder 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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31.35%

Born in Boulder County, Colorado

89.34%

Native Born

10.66%

Foreign Born

6.12%

Non Citizen

4.54%

Naturalized

Place of Birth

89.34% of Boulder County, Colorado residents were born in the United States, with 31.35% having been born in Colorado. 6.12% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Boulder 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