Boulder Population

2010–2026

252

2026 projection

11% since 2020 (increase)

050100150200250300201020122014201620182020202220242026

Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for Boulder. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
2026252+41.61%
2025248-31.20%
2024251+10.40%
2023250+20.81%
2022248+83.33%
2021240+135.73%
2020227+20.89%
2019225+31.35%
2018222-41.77%
2017226+83.67%

Showing 10 of 17 years.

The 2020 row compares the April 1 Census count with the July 1, 2019 estimate (about nine months). Its Growth and Annual change therefore do not represent a full year.

Growth since 2020, compared

Boulder is growing faster than Garfield County and the U.S., and slower than Utah.

  • Utah+7.8%
  • Boulder+5.5%
  • United States+3.1%
  • Garfield County+3.0%

Change from July 1, 2020 to July 1, 2025 population estimates—not annualized growth or site projections.

Source: U.S. Census Bureau. U.S. totals are summed from the 50 states and D.C.; unavailable comparisons are omitted.

Boulder Demographics

42.4median age

Median age

Female37.2 yrs
Male65.6 yrs

Adults

288
159 seniors (65+) · 55% of adults129 other adults

Sex

Female 63.3% · 228Male 36.7% · 132

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 4 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

Boulder Income

$39,688median household income

Median household income

$39,688

Half of households earn more, half earn less

Median earnings

$20,282

Typical yearly pay for a worker 25 or older.

Poverty rate

24.2%

About 1 in 4 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

Boulder Marital Status

68% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married68%71%66%
Never married16%15%16%
Divorced8%9%8%
Widowed8%5%10%
Separated0%0%0%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201