Jefferson County Demographics

A map of Jefferson County's Population by Race

Jefferson County, Colorado had a population of 582,910 in 2020. It was 74.7% White, 1.1% Black, 3.0% Asian, 15.7% Hispanic, 1.1% Native American/Other, and 4.4% Multiracial. This map presents the population of Jefferson County, with one dot drawn for each person counted in the 2020 Census, color-coded by race.

Jefferson County is the 4th most populous county of the 64 counties in Colorado.

Jefferson County's White Population

435,245 residents of Jefferson County identify as White, or 74.7%. This makes the White share of the population of Jefferson County slightly larger than the White share of the population of Colorado (65.1% White). Of the 64 counties in Colorado, Jefferson County is ranked #37 in terms of White residents as a share of the population.

Jefferson County is more White than neighboring Denver County (54.3% White), and Broomfield County (72.7% White). Jefferson County is less White than neighboring Gilpin County (85.3% White), Clear Creek County (86.7% White), and Douglas County (77.9% White).

Jefferson County's Black Population

6,653 residents of Jefferson County identify as Black, or 1.1%. This makes the Black share of the population of Jefferson County roughly similar to the Black share of the population of Colorado (3.8% Black). Of the 64 counties in Colorado, Jefferson County is ranked #18 in terms of Black residents as a share of the population.

Jefferson County is more Black than neighboring Gilpin County (0.6% Black), and Clear Creek County (0.5% Black). Jefferson County is less Black than neighboring Douglas County (1.3% Black), Denver County (8.5% Black), and Broomfield County (1.3% Black).

Jefferson County's Asian Population

17,694 residents of Jefferson County identify as Asian, or 3.0%. This makes the Asian share of the population of Jefferson County roughly similar to the Asian share of the population of Colorado (3.4% Asian). Of the 64 counties in Colorado, Jefferson County is ranked #7 in terms of Asian residents as a share of the population.

Jefferson County is more Asian than neighboring Gilpin County (1.5% Asian), and Clear Creek County (0.9% Asian). Jefferson County is less Asian than neighboring Douglas County (5.5% Asian), Denver County (3.8% Asian), and Broomfield County (6.9% Asian).

Jefferson County's Hispanic Population

91,514 residents of Jefferson County identify as Hispanic, or 15.7%. This makes the Hispanic share of the population of Jefferson County slightly less than the Hispanic share of the population of Colorado (21.9% Hispanic). Of the 64 counties in Colorado, Jefferson County is ranked #30 in terms of Hispanic residents as a share of the population.

Jefferson County is more Hispanic than neighboring Gilpin County (6.5% Hispanic), Clear Creek County (6.9% Hispanic), Douglas County (9.5% Hispanic), and Broomfield County (13.4% Hispanic). Jefferson County is less Hispanic than neighboring Denver County (27.9% Hispanic).

Jefferson County's Native American/Other Population

6,178 residents of Jefferson County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 1.1%. This makes the Native American/Other share of the population of Jefferson 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, Jefferson County is ranked #38 in terms of Native American/Other residents as a share of the population.

Jefferson County is more Native American/Other than neighboring Clear Creek County (0.9% Native American/Other), Douglas County (0.8% Native American/Other), and Broomfield County (0.8% Native American/Other). Jefferson County is less Native American/Other than neighboring Gilpin County (1.3% Native American/Other), and Denver County (1.2% Native American/Other).

Jefferson County's Multiracial Population

25,626 residents of Jefferson County identify as Multiracial, or 4.4%. This makes the Multiracial share of the population of Jefferson County roughly similar to the Multiracial share of the population of Colorado (4.5% Multiracial). Of the 64 counties in Colorado, Jefferson County is ranked #18 in terms of Multiracial residents as a share of the population.

Jefferson County is more Multiracial than neighboring Clear Creek County (4.1% Multiracial), and Denver County (4.2% Multiracial). Jefferson County is less Multiracial than neighboring Gilpin County (4.9% Multiracial), Douglas County (4.9% Multiracial), and Broomfield County (4.9% Multiracial).

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