Boulder, Colorado Population 2021

105,003
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Boulder is a city located in Boulder County Colorado. It is also the county seat of Boulder County. With a 2020 population of 105,003, it is the 12th largest city in Colorado and the 298th largest city in the United States . Boulder is currently declining at a rate of -0.32% annually but its population has increased by 7.82% since the most recent census, which recorded a population of 97,385 in 2010. Boulder reached it's highest population of in . Spanning over 27 miles, Boulder has a population density of 3,994 people per square mile.

The average household income in Boulder is $109,410 with a poverty rate of 20.39%. The median rental costs in recent years comes to $1,554 per month, and the median house value is $700,000. The median age in Boulder is 28.6 years, 27.9 years for males, and 29.7 years for females.

Boulder is located at the foothills of the Rocky Mountains about 25 miles northwest of Denver. Boulder is well-known for its history, the University of Colorado and its large hippie population in the 1960s. The city also frequently tops rankings for education, health, and quality of life.

Boulder Population Statistics

Boulder has a population younger than the national average with a median age of 28.7 years compared to the U.S. median age of 37.2. About one-third of Boulder's population is between the ages of 18 and 24, mostly due to a large number of university students.

The city has a median household income of just over $57,000, with a median family income of $113,600. Full-time female workers make $47,500 compared to full-time male workers at $72,000. A full 25% of the population lives below the poverty line. Boulder usually has higher home prices than nearby areas.

Boulder Facts

  • Among 14 comparable cities, Boulder has the most people who walk to work, work at home and carpool, and it ranks second in terms of people who bike.
  • Bicycling is so popular in the city that the Boulder Creek bike path is often plowed of snow before the roads.
  • Colorado has fewer overweight people per capita and more people who exercise regularly than any other state.
  • 70% of Boulderites own a bicycle.
  • Boulder is the largest beer-producing triangle in the world with Anheuser-Busch and Coors.
  • Robert Redford was a janitor in Boulder before he became famous.
  • Boulder has a "blue line" which deters expanding structures over four stories that would prevent views of the mountains.
  • Boulder's top rankings include Lesser-Known LGBT Family-Friendly City, Best City to Raise an Outdoor Kid, Top 10 Healthiest Cities to Live and Retire (#6), Top Brainiest City, Top Happiest City, Top 10 Cities for Artists (#8).

Boulder was first home to Native Americans who had a village nearby. The first non-native settlement was established in 1858 by gold seekers. The Boulder City Town Company was created a year later with lots that had a purchase price of $1,000, which was lowered to bring in more residents. The government was formalized in 1871 when the town was incorporated.

By 1880, Boulder had a population of more than 3,000. Many trainees came to the area after World War II as business people and students, joining veterans attending the University. Before this, the population had not grown since the 1920s.

Boulder Demographics

According to the most recent ACS, the racial composition of Boulderwas:

  • White: 87.37%
  • Asian: 5.80%
  • Two or more races: 3.82%
  • Other race: 1.51%
  • Black or African American: 1.20%
  • Native American: 0.21%
  • Native Hawaiian or Pacific Islander: 0.10%
The current population of Boulder, Colorado is 105,003 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 105,673.The last official US Census in 2010 recorded the population at 97,385.

Boulder, Colorado Population 2021

2020 and 2021 population is estimated by projecting the 2019 numbers.

Year Population Growth Growth Rate
2021329,3161,5600.47%
2020327,7561,5600.48%
2019326,1961,5600.48%
2018324,6362,1950.68%
2017322,4411,1910.37%
2016321,2503,2231.00%
2015318,0275,7941.82%
2014312,2332,9100.93%
2013309,3234,7531.54%
2012304,5704,6131.51%
2011299,9574,9201.64%
2010295,0370.00%

Boulder Metro Area Population by Year

Population by Race

Race Population Percentage
White92,95787.37%
Asian6,1715.80%
Two or More Races4,0603.82%
Some Other Race1,6091.51%
Black or African American1,2731.20%
American Indian and Alaska Native2190.21%
Native Hawaiian and Other Pacific Islander1030.10%
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Boulder Population by Race

Boulder Population Pyramid $2021

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Boulder Median Age

28.6


Total

27.9


Male

29.7


Female

Boulder Adults

There are 93,118 adults, (11,926 of whom are seniors) in Boulder.

Boulder Age Dependency

31

Age Dependency Ratio

14.7

Old Age Dependency Ratio

16.3

Child Dependency Ratio

Boulder Sex Ratio

Female

51,232

48.15%

Male

55,160

51.85%

Boulder Population by Age

Boulder Renter vs Owner Occupied by Household Type

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Boulder Household Types

Type Owner Renter
Non Family31.1%68.9%
Female47%53%
All48.4%51.6%
Male55%45%
Married76.9%23.1%

48.4%

Rate of Home Ownership

Boulder Households and Families

Type Count Average Size Owned
All42,1212.2748.4
Non Family24,4391.7731.1
Married14,5612.9576.9
Female1,952347
Male1,1692.9455

2.87

Average Family Size

2.27

Average Household Size

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Boulder Households by Type

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Education Attained Count Percentage
Less Than 9th Grade8941.46%
9th to 12th Grade9781.60%
High School Graduate3,8116.23%
Some College6,76611.06%
Associates Degree2,2063.61%
Bachelors Degree22,16836.23%
Graduate Degree24,36339.82%
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Boulder Educational Attainment by Sex (over 25)

Boulder Educational Attainment by Race

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Race Total High School Bachelors
White51,35450,80740,732
Hispanic4,5713,4931,926
Asian3,1423,0202,527
2+ Races1,4901,4151,053
Other Race842651383
Black562518224
Native American1789458
Islander636347

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 80.43%.

Boulder Educational Attainment by Race

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Name Average Male Female
Overall$50,196$57,664$41,069
Less Than 9th Grade$26,844$31,120$17,035
High School Graduate$26,731$30,060$25,788
Some College$30,895$35,240$26,434
Bachelors Degree$50,172$56,930$41,405
Graduate Degree$68,260$82,800$53,794

$50,196

Average Earnings

$57,664

Average Male

$41,069

Average Female

Boulder Earnings by Educational Attainment

Boulder Language by Age

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Boulder Language

84.68% of Boulder residents speak only English, while 15.32% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 6.04% of the population.

Boulder Language

Boulder Poverty by Race

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Name Total In Poverty Poverty Rate
White77,13215,27819.81%
Hispanic9,0081,76819.63%
Asian4,9411,27425.78%
Multiple3,80491424.03%
Other1,60941926.04%
Black1,07937534.75%
Native1974020.30%
Islander633352.38%

20.39%

Overall Poverty Rate

20.96%

Male Poverty Rate

19.78%

Female Poverty Rate

Poverty in Boulder

The race most likely to be in poverty in Boulder is Islander, with 52.38% below the poverty level.

The race least likely to be in poverty in Boulder is Hispanic, with 19.63% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.68%. Among those working part-time, it was 37.09%, and for those that did not work, the poverty rate was 29.88%.

Boulder Poverty

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Name Poverty
Less Than 9th Grade15.80%
Some College15.00%
High School13.88%
Bachelors or Greater6.03%

Boulder Poverty Rate by Education

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Rate Poverty
Male Unemployed48.07%
Female Unemployed29.22%
Female Employed17.72%
Male Employed11.93%

Boulder Poverty Rate by Employment Status and Sex

Boulder Income by Household Type

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Name Median Mean
Households$69,520$109,410
Families$124,844$162,974
Married Families$141,921-
Non Families$45,488$68,545
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Income by Household Type

Boulder Marital Status

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Marriage Rates

32.4%

Overall Marriage Rate

31.4%

Male Marriage Rate

33.6%

Female Marriage Rate

Boulder Married by Age and Sex

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Boulder Marriage

The age group where males are most likely to be married is 45-54, while the female age group most likely to be married is 35-44.

Boulder Marital Status by Race

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Boulder Marital Status

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3,117

Number of Veterans

2,799

Male Veterans

318

Female Veterans

War Veterans
Vietnam1,030
Second Gulf War787
First Gulf War445
Korea334
World War II266

Boulder Veterans by War

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Age Group Veterans
75+963
65 to 74769
35 to 54579
18 to 34553
55 to 64253

Boulder Veterans by Age

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Name Veterans % of Total
White3,0083.67%
Hispanic1391.77%
2+ Races501.88%
Asian220.40%
Islander1615.53%
Black110.97%
Other Race100.70%

Boulder Veterans by Race

Boulder Veterans by Education

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10.19%

Veteran Poverty Rate

26.13%

Veteran Disability Rate

Boulder Veterans by Education

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66.2%

Labor Force Participation

63.1%

Employment Rate

4.6%

Unemployment Rate

Boulder Employment by Age

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Boulder Employment by Race

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Boulder 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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27.27%

Born in Boulder

88.99%

Native Born

11.01%

Foreign Born

6.80%

Non Citizen

4.21%

Naturalized

Place of Birth

88.99% of Boulder residents were born in the United States, with 27.27% having been born in Colorado. 6.80% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Boulder Place of Birth

Note: 2020 and 2021 data is projected
Year Population Growth Annual Growth Rate
2021105,003-335-0.32%
2020105,338-335-0.32%
2019105,673-335-0.32%
2018106,008-439-0.41%
2017106,447-681-0.64%
2016107,1283860.36%
2015106,7422,2912.19%
2014104,4511,7321.69%
2013102,7191,5591.54%
2012101,1601,0231.02%
2011100,1372,3852.44%
201097,7523,0790.32%
200094,67311,3611.29%
199083,3126,6270.83%
198076,6859,8151.38%
197066,87029,1525.89%
196037,71817,7196.55%
195019,9997,0414.44%
194012,9581,7351.45%
193011,2232170.20%
192011,0061,4671.44%
19109,5393,3894.49%
19006,1502,8206.33%
18903,3302610.82%
18803,0690.00%

Boulder Population by Year