Population By Race and Ethnicity in Boulder County, CO in 2021

Updated on January 29, 2024.

Based on the US Census Vintage data estimates, in 2021, the 327,075 population of Boulder County, Colorado comprised of 45,854 people who identified as Hispanic (14.02%), and 281,221 people who identified as Non-Hispanic (85.98%).

Race: The White Alone population was the largest racial group in Boulder County, Colorado with a population of 293,660 (89.78%); Asian Alone population was the second largest racial group with a population of 16,467 (5.04%); and Two Or More Races was the third largest racial group with a population of 9,719 (2.97%).

Ethnicity: The White Alone - Non Hispanic population was the largest ethnic group in Boulder County, Colorado in 2021, with a population of 252,529 (77.21%); the second largest ethnic group was White Alone - Hispanic with a population of 41,131 (12.58%); and the third largest ethnic group was Asian Alone - Non Hispanic with a population of 16,040 (4.9%).

The charts and tables below shows the population and percentage of each racial and ethnicity group in Boulder, Colorado.

You can find similar information for other Colorado counties, and for Colorado.

See this for other years:
Hispanics and Non Hispanics in Boulder County, CO in 2021
Total Population:
Race in Boulder County, CO in 2021
Total Population:
Ethnicity in Boulder County, CO in 2021
Total Population:
Population By Race in Boulder , CO in 2021
Race Population Percentage
Black or African American Alone 4,057 1.24%
White Alone 293,660 89.78%
American Indian and Alaska Native Alone 2,906 0.89%
Asian Alone 16,467 5.04%
Native Hawaiian And Pacific Islander Alone 266 0.08%
Two Or More Races 9,719 2.97%
Population By Ethnicity in Boulder , CO in 2021
Ethnicity Population Percentage
Black or African American Alone - Hispanic 798 0.24%
White Alone - Hispanic 41,131 12.58%
American Indian and Alaska Native Alone - Hispanic 1,612 0.49%
Asian Alone - Hispanic 427 0.13%
Native Hawaiian And Pacific Islander Alone - Hispanic 88 0.03%
Two Or More Races - Hispanic 1,798 0.55%
Black or African American Alone - Non Hispanic 3,259 1%
White Alone - Non Hispanic 252,529 77.21%
American Indian and Alaska Native Alone - Non Hispanic 1,294 0.4%
Asian Alone - Non Hispanic 16,040 4.9%
Native Hawaiian And Pacific Islander Alone - Non Hispanic 178 0.05%
Two Or More Races - Non Hispanic 7,921 2.42%