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 2026 population of 105,995. 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 -2.23% since the most recent census, which recorded a population of 108,418 in 2020.

The median household income in Boulder is $87,493 with a poverty rate of 21.45%. 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 106.8 males.

106K
Total Population
3,941
Density (mi²)
-404 -0.38%
Growth

Boulder Population

Boulder Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
2026105,995-404-0.38%
2025106,399-404-0.38%
2024106,8031690.16%
2023106,6345550.52%
2022106,0791,7631.69%
2021104,316-4,102-3.78%
2020108,418-138-0.13%
2019107,703-1,366-1.25%
2018109,069-49-0.04%
2017109,1189600.89%
2016108,1581,3781.29%
2015106,7802,9822.87%
2014103,7989680.94%
2013102,8301,4941.47%
2012101,3361,8031.81%
201199,5331,8091.85%
201097,7243390.35%
200094,67311,36113.64%
199083,3126,6278.64%
198076,6859,81514.68%
197066,87029,15277.29%
196037,71817,71988.6%
195019,9997,04154.34%
194012,9581,73515.46%
193011,2232171.97%
192011,0061,46715.38%
19109,5393,38955.11%
19006,1502,82084.68%
18903,3302618.5%
18803,06900%

Median Age

Overall: 28.8 years
Female: 29.4 years
Male: 28.3 years

Boulder Adults

There are 93,927 adults, (13,474 of whom are seniors) in Boulder.

Sex Ratio

Female: 51,459 (48.3%)
Male: 54,974 (51.7%)

Demographics

The racial composition of Boulder includes 80.26% White, 5.45% Asian, and smaller percentages for other race, Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White85,42780.26%
Two or more races11,57410.87%
Asian5,8055.45%
Other race2,0831.96%
Black or African American1,1221.05%
Native American3700.35%
Native Hawaiian or Pacific Islander520.05%
Race
Population ↓
Percentage (of total)
Two or more races6,9436.52%
White2,3762.23%
Other race1,7821.67%
Native American1300.12%
Black or African American720.07%
Asian650.06%
Race
Population ↓
Percentage (of total)
White83,05178.03%
Asian5,7405.39%
Two or more races4,6314.35%
Black or African American1,0500.99%
Other race3010.28%
Native American2400.23%
Native Hawaiian or Pacific Islander520.05%

Boulder Marital Status

Economics and Income Statistics

Boulder 's average per capita income is $68,969. Household income levels show a median of $87,493. The poverty rate stands at 21.45%.

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$195,939-
Families$170,325$226,767
Households$87,493$148,050
Non Families$53,376$93,481

$68,969

Average Income

$87,493

Median Household Income

21.45%

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)