Boulder County Demographics

A map of Boulder County's Population by Race

Boulder County, Colorado had a population of 330,758 in 2020. It was 74.1% White, 1.0% Black, 4.9% Asian, 14.6% Hispanic, 1.0% Native American/Other, and 4.5% Multiracial. This map presents the population of Boulder County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Boulder County is the 8th most populous county of the 64 counties in Colorado.

Boulder County's White Population

245,203 residents of Boulder County identify as White, or 74.1%. This makes the White share of the population of Boulder County slightly larger than the White share of the population of Colorado (65.1% White). Of the 64 counties in Colorado, Boulder County is ranked #38 in terms of White residents as a share of the population.

Boulder County is more White than neighboring Broomfield County (72.7% White). Boulder County is less White than neighboring Gilpin County (85.3% White), Clear Creek County (86.7% White), Jefferson County (74.7% White), and Larimer County (78.7% White).

Boulder County's Black Population

3,149 residents of Boulder County identify as Black, or 1.0%. This makes the Black share of the population of Boulder County roughly similar to the Black share of the population of Colorado (3.8% Black). Of the 64 counties in Colorado, Boulder County is ranked #21 in terms of Black residents as a share of the population.

Boulder County is more Black than neighboring Gilpin County (0.6% Black), and Clear Creek County (0.5% Black). Boulder County is less Black than neighboring Broomfield County (1.3% Black), and Jefferson County (1.1% Black).

Boulder County's Asian Population

16,291 residents of Boulder County identify as Asian, or 4.9%. This makes the Asian share of the population of Boulder County roughly similar to the Asian share of the population of Colorado (3.4% Asian). Of the 64 counties in Colorado, Boulder County is ranked #4 in terms of Asian residents as a share of the population.

Boulder County is more Asian than neighboring Gilpin County (1.5% Asian), Clear Creek County (0.9% Asian), Jefferson County (3% Asian), and Larimer County (2.3% Asian). Boulder County is less Asian than neighboring Broomfield County (6.9% Asian).

Boulder County's Hispanic Population

48,168 residents of Boulder County identify as Hispanic, or 14.6%. This makes the Hispanic share of the population of Boulder County slightly less than the Hispanic share of the population of Colorado (21.9% Hispanic). Of the 64 counties in Colorado, Boulder County is ranked #33 in terms of Hispanic residents as a share of the population.

Boulder County is more Hispanic than neighboring Gilpin County (6.5% Hispanic), Broomfield County (13.4% Hispanic), Clear Creek County (6.9% Hispanic), and Larimer County (12.4% Hispanic). Boulder County is less Hispanic than neighboring Jefferson County (15.7% Hispanic).

Boulder County's Native American/Other Population

3,173 residents of Boulder County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 1.0%. This makes the Native American/Other share of the population of Boulder County roughly similar to the Native American/Other share of the population of Colorado (1.3% Native American/Other). Of the 64 counties in Colorado, Boulder County is ranked #44 in terms of Native American/Other residents as a share of the population.

Boulder County is more Native American/Other than neighboring Broomfield County (0.8% Native American/Other), and Clear Creek County (0.9% Native American/Other). Boulder County is less Native American/Other than neighboring Gilpin County (1.3% Native American/Other), and Jefferson County (1.1% Native American/Other).

Boulder County's Multiracial Population

14,774 residents of Boulder County identify as Multiracial, or 4.5%. This makes the Multiracial share of the population of Boulder County roughly similar to the Multiracial share of the population of Colorado (4.5% Multiracial). Of the 64 counties in Colorado, Boulder County is ranked #16 in terms of Multiracial residents as a share of the population.

Boulder County is more Multiracial than neighboring Clear Creek County (4.1% Multiracial), and Jefferson County (4.4% Multiracial). Boulder County is less Multiracial than neighboring Gilpin County (4.9% Multiracial), Broomfield County (4.9% Multiracial), and Larimer County (4.6% Multiracial).

Source: 2020 Census State Redistricting Data and Census TIGER/Line Shapefiles.