Boulder, Colorado Population 2020

107,353

Boulder is the county seat and most populous city of Boulder County, Colorado. It is also the 11th largest city in the state. Boulder is located at the foothills of the Rocky Mountains about 25 miles northwest of Denver.

The estimated population of Boulder is 107,353, up from 97,395 at the 2010 census. The population of the Boulder Metropolitan Statistical Area is much larger, estimated at 300,000. The city has a population density of 3,947 people per square mile, or 1,524 per square kilometer.

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 History

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 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, Colorado's estimated population is 107,353 according to the most recent United States census estimates. Boulder, Colorado is the 11th largest city in Colorado based on official 2017 estimates from the US Census Bureau.

The population density is 4085.77 people/mi² (1577.52 people/km²).

The overall median age is 28.7 years, 27.8 years for males, and 30 years for females. For every 100 females there are 109.0 males.

The median income for households in Boulder, Colorado is $, while the mean household income is $.

Boulder Demographics

According to the most recent ACS, the racial composition of Boulder was:

  • White: 87.19%
  • Asian: 5.56%
  • Two or more races: 3.88%
  • Other race: 1.85%
  • Black or African American: 1.16%
  • Native American: 0.27%
  • Native Hawaiian or Pacific Islander: 0.09%

How Many People Live in Boulder, Colorado?

107,353
Year Population Growth Annual Growth Rate
2018107,353-542-0.50%
2017107,895-393-0.36%
2016108,2884950.46%
2015107,7932,3112.19%
2014105,4821,8421.78%
2013103,6401,4711.44%
2012102,1691,0541.04%
2011101,1152,6032.64%
201098,5123,8390.40%
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%
Year Total Population Growth Annual Growth Rate
2018326,0782,0050.61%
2017324,0731,5460.48%
2016322,5273,3521.04%
2015319,1755,8771.84%
2014313,2983,0510.97%
2013310,2474,6821.51%
2012305,5654,6681.53%
2011300,8975,1231.70%
2010295,7740.00%

Population by Race

Race Population Percentage
White93,60587.19%
Asian5,9705.56%
Two or More Races4,1703.88%
Some Other Race1,9811.85%
Black or African American1,2501.16%
American Indian and Alaska Native2890.27%
Native Hawaiian and Other Pacific Islander950.09%

Boulder Population Pyramid 2020

Boulder Median Age

28.7


Total

27.8


Male

30


Female

Boulder Adults

There are 93,709 adults, (11,416 of whom are seniors) in Boulder.

Boulder Age Dependency

30.5

Age Dependency Ratio

13.9

Old Age Dependency Ratio

16.6

Child Dependency Ratio

Boulder Sex Ratio

Female

51,376

47.85%

Male

55,984

52.15%

Boulder Households and Families

Boulder Renter vs Owner Occupied by Household Type

Boulder Household Types

Type Owner Renter
Married75.7%24.3%
All48%52%
Female45.4%54.6%
Male45.2%54.8%
Non Family31.8%68.2%

48.0%

Rate of Home Ownership

Type Count Average Size Owned
All42,6432.2648
Non Family24,4821.7731.8
Married14,7162.9575.7
Female2,0772.9345.4
Male1,3682.8545.2

2.85

Average Family Size

2.26

Average Household Size

7.8%

Unmarried (Opposite Sex)

0.6%

Unmarried (Same Sex)

Boulder Education

Education Attained Count Percentage
Less Than 9th Grade9621.56%
9th to 12th Grade1,2111.96%
High School Graduate4,1286.69%
Some College7,65512.40%
Associates Degree2,1853.54%
Bachelors Degree21,59334.98%
Graduate Degree23,99338.87%

Boulder Educational Attainment by Race

Name Total High School Bachelors
White51,71751,08139,855
Hispanic4,7373,5952,055
Asian3,2782,9992,381
Multiple Races1,5111,4421,055
Other Race1,026764466
Black602560306
Native American217137111
Islander353535

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 islander people with a rate of 100.00%.

Name Average Male Female
Overall$47,670$54,349$39,925
Less Than High School$23,818$26,445$18,333
High School Grad$23,774$27,766$20,739
Some College$30,305$33,852$25,013
Bachelors Degree$48,446$54,879$41,529
Graduate Degree$64,070$81,715$52,141

$47,670

Average Earnings

$54,349

Average Male

$39,925

Average Female

Boulder Language

Boulder Language by Age

Boulder Language

84.16% of Boulder residents speak only English, while 15.84% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 6.67% of the population.

Boulder Poverty

Boulder Poverty by Race

Name Total In Poverty Poverty Rate
White78,02415,76920.21%
Hispanic9,4332,38025.23%
Asian4,7501,15524.32%
Multiple3,9541,00425.39%
Black1,04841639.69%
Other1,96837118.85%
Native2623814.50%
Islander352777.14%

21.26%

Overall Poverty Rate

21.50%

Male Poverty Rate

21.01%

Female Poverty Rate

Poverty in Boulder

The race most likely to be in poverty in Boulder is Islander, with 77.14% below the poverty level.

The race least likely to be in poverty in Boulder is Native, with 14.50% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.50%. Among those working part-time, it was 38.10%, and for those that did not work, the poverty rate was 30.64%.

Name Poverty
Less Than High School18.07%
High School18.07%
Some College15.66%
Bachelors or Greater6.73%
Name Poverty
Male Unemployed46.54%
Female Unemployed37.58%
Female Employed18.01%
Male Employed12.74%

Boulder Income

Boulder Income by Household Type

Name Median Mean
Households$66,117$102,803
Families$113,984$150,829
Married Families$130,504$166,526
Non Families$43,425$65,226

Boulder Marital Status

Boulder Marital Status

Marriage Rates

32.7%

Overall Marriage Rate

31.9%

Male Marriage Rate

33.6%

Female Marriage Rate

Boulder Married by Age and Sex

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

Boulder Veterans

3,162

Number of Veterans

2,821

Male Veterans

341

Female Veterans

War Veterans
Vietnam1,094
Second Gulf War764
First Gulf War435
Korea320
World War II269

Boulder Veterans by Race

Name Veterans % of Total
White3,0423.69%
Hispanic1892.34%
Other663.86%
2 or More461.65%
Asian80.15%

Boulder Veterans by Education

11.37%

Veteran Poverty Rate

25.07%

Veteran Disability Rate

Boulder Employment Status

66.1%

Labor Force Participation

62.7%

Employment Rate

5.1%

Unemployment Rate

Boulder Place of Birth

Origin of Non Citizens

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

Origin of Naturalized Citizens

26.85%

Born in Colorado

88.55%

Native Born

11.45%

Foreign Born

7.05%

Non Citizen

Place of Birth

88.55% of Boulder residents were born in the United States, with 26.85% having been born in Colorado. 7.05% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.