Boulder County, Colorado Demographics 2026

Population Overview

Boulder County is located in Colorado with a total population of 328,317. It is the 9th most populous county out of 64 in Colorado.

Age Demographics

The median age in Boulder County is 37.5 years. This is about average than the state median of 37.5 years.

Economy, Income & Housing

The median household income in Boulder County is $102,772. This is 11% higher than the state median of $92,470. Compared to the national median of $78,538, household income here is 31% higher. The poverty rate stands at 11.5%. This is 22% higher than the state poverty rate of 9.4%. The unemployment rate is 4.6%. This is 3% higher than the state rate of 4.5%. The median home value is $713,900. Housing costs are 42% higher than the state median of $502,200. The home-value-to-income ratio of 6.9x suggests that housing affordability is a significant concern for many residents. 62.5% of occupied housing units are owner-occupied. This homeownership rate is 6% lower than the state average of 66.3%.

Race & Ethnicity

The largest racial or ethnic group in Boulder County is White (non-Hispanic), making up 75.3% of the population. Hispanic or Latino residents account for 14.6%. The Black or African American population (0.8%) is well below the state average of 3.8%.

Education

63.9% of residents aged 25 and older hold a bachelor's degree or higher. This places Boulder County in the top 10% of all cities in the state for educational attainment. This is 43% higher than the state rate of 44.7%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 95.5%. Notably, 29.4% of adults hold a graduate or professional degree, indicating a highly educated workforce.