Boulder County, Colorado Demographics 2026
Boulder County, Colorado has a population of 328,961, the 9th most populous county in Colorado. The median household income is $103,994 and the median home value is $756,300. The poverty rate is 11.2%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Boulder County Quick Facts
How Boulder County Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 328,317 | 328,961 | +0.2% |
| Median household income | $102,772 | $103,994 | +1.2% |
| Median home value | $713,900 | $756,300 | +5.9% |
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
Moderate diversity with one or two groups making up the majority.
State average: 52 | National average: 61
Education
Educational Attainment (Adults 25+)
Cities & Places in Boulder County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Boulder | 106,433 | $87,493 | 21.4% | $1,039,500 |
| Lafayette | 30,602 | $119,040 | 5.6% | $686,500 |
| Louisville | 20,786 | $147,319 | 4.5% | $883,900 |
| Gunbarrel | 10,051 | $109,407 | 8.8% | $821,000 |
| Niwot | 3,447 | $146,492 | 2.2% | $995,700 |
| Lyons | 1,838 | $122,837 | 11.9% | $845,400 |
| Nederland | 1,655 | $122,917 | 2.7% | $707,100 |
| Allenspark | 825 | $108,056 | 8.2% | $742,900 |
| Lazy Acres | 778 | $147,625 | 17.1% | $1,024,700 |
| Paragon Estates | 667 | $230,268 | 5.0% | $1,617,500 |
| Altona | 587 | $149,327 | 3.9% | $1,084,000 |
| Pine Brook Hill | 543 | $63,606 | 3.1% | $1,099,100 |
| Sugarloaf | 474 | N/A | 0.0% | $1,255,400 |
| Eldora | 465 | N/A | 52.9% | $500,000 |
| St. Ann Highlands | 453 | $188,125 | 0.0% | $936,200 |
| Tall Timber | 382 | $203,110 | 0.0% | $1,086,200 |
| Sunshine | 330 | N/A | 7.3% | $1,043,600 |
| Jamestown | 324 | $149,375 | 2.5% | $595,900 |
| Eldorado Springs | 320 | $133,008 | 9.1% | $809,200 |
| Crisman | 268 | $172,574 | 6.7% | $846,600 |
| Bark Ranch | 199 | $115,521 | 0.0% | $772,100 |
| Seven Hills | 183 | N/A | 0.0% | N/A |
| Mountain Meadows | 180 | N/A | 0.0% | $1,038,800 |
| Gold Hill | 178 | N/A | 29.2% | $611,900 |
| Ward | 103 | $56,875 | 22.3% | $322,200 |
| Glendale | 69 | $199,063 | 0.0% | $823,500 |
| Bonanza Mountain Estates | 56 | N/A | 7.1% | N/A |
| Hidden Lake | 29 | N/A | 0.0% | N/A |
| Valmont | 27 | $75,357 | 11.1% | $692,300 |
Explore Colorado Rankings
Population Overview
Boulder County is located in Colorado with a total population of 328,961. It is the 9th most populous county out of 64 in Colorado. The county encompasses 29 Census-designated places.
Age Demographics
The median age in Boulder County is 37.7 years. This is about the same as the state median of 37.7 years.
Economy, Income & Housing
The median household income in Boulder County is $103,994. This is 9% higher than the state median of $95,470. It is also 29% higher than the national median of $80,734. The poverty rate stands at 11.2%. This is 18% higher than the state poverty rate of 9.4%. The unemployment rate is 4.8%. This is 4% higher than the state rate of 4.6%. The median home value is $756,300. Housing costs are 40% higher than the state median of $539,400. The home-value-to-income ratio of 7.3x suggests that housing affordability is a significant concern for many residents. 62.0% of occupied housing units are owner-occupied. This homeownership rate is 6% lower than the state average of 66.2%.
Race & Ethnicity
The largest racial or ethnic group in Boulder County is White (non-Hispanic), making up 74.5% of the population. Hispanic or Latino residents account for 14.7%. The Black or African American population (0.8%) is well below the state average of 3.8%.
Education
64.2% of residents aged 25 and older hold a bachelor's degree or higher. This places Boulder County in the top 10% of all counties in the state for educational attainment. This is 40% higher than the state rate of 45.7%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 95.8%. Notably, 30.0% of adults hold a graduate or professional degree, indicating a highly educated workforce.
Data Sources & Methodology
All figures for Boulder County come from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates, with comparisons drawn against Colorado and national averages from the same dataset. See our methodology page for how each metric is defined, or data.census.gov for official tables with margins of error.
Frequently Asked Questions
What is the population of Boulder County, Colorado?
Boulder County has a population of 328,961, making it the 9th most populous county in Colorado.
What is the median income in Boulder County?
The median household income in Boulder County is $103,994 with a poverty rate of 11.2%.
How many cities are in Boulder County, Colorado?
Boulder County contains 29 Census-designated places.