Boulder Flag

Boulder

County:
Boulder County
County Seat:
Yes
Area (mi²):
26.894
State:
Colorado

Boulder is a city located in Boulder County, Colorado. Boulder has a 2025 population of 106,399 . It is also the county seat of Boulder County . Boulder is currently declining at a rate of -0.38% annually and its population has decreased by -1.86% since the most recent census, which recorded a population of 108,418 in 2020.

The average household income in Boulder is $140,662 with a poverty rate of 21.8%. The median age in Boulder is 28.8 years: 28.3 years for males, and 29.4 years for females. For every 100 females there are 107.4 males.

106.4K
Total Population
3,956
Density (mi²)
-404 -0.38%
Growth

Boulder Population

Boulder Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Boulder includes 81.77% White, 5.77% Asian, and smaller percentages for other race, Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White (81.77%)

Two or more races (9.22%)

Asian (5.77%)

Other race (1.78%)

Black or African American (1.07%)

Native American (0.32%)

Native Hawaiian or Pacific Islander (0.06%)

Race
Population
Percentage (of total)
White86,90581.77%
Two or more races9,7969.22%
Asian6,1375.77%
Other race1,8891.78%
Black or African American1,1391.07%
Native American3440.32%
Native Hawaiian or Pacific Islander640.06%

Boulder Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Boulder's average per capita income is $64,110. Household income levels show a median of $85,364. The poverty rate stands at 21.8%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Married Families$185,000-
Families$163,202$212,670
Households$85,364$140,662
Non Families$53,184$92,067

$64,110

Average Income

$85,364

Median Household Income

21.8%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)