Jefferson County Demographics

A map of Jefferson County's Population by Race

Jefferson County, Wisconsin had a population of 84,900 in 2020. It was 86.4% White, 1.0% Black, 0.8% Asian, 8.3% Hispanic, 0.5% Native American/Other, and 3.0% 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 20th most populous county of the 72 counties in Wisconsin.

Jefferson County's White Population

73,325 residents of Jefferson County identify as White, or 86.4%. This makes the White share of the population of Jefferson County slightly larger than the White share of the population of Wisconsin (78.6% White). Of the 72 counties in Wisconsin, Jefferson County is ranked #51 in terms of White residents as a share of the population.

Jefferson County is more White than neighboring Walworth County (82.7% White), Rock County (79.3% White), Waukesha County (85.5% White), and Dane County (76% White). Jefferson County is less White than neighboring Dodge County (87.1% White).

Jefferson County's Black Population

864 residents of Jefferson County identify as Black, or 1.0%. This makes the Black share of the population of Jefferson County slightly less than the Black share of the population of Wisconsin (6.2% Black). Of the 72 counties in Wisconsin, Jefferson County is ranked #31 in terms of Black residents as a share of the population.

Jefferson County is less Black than neighboring Dodge County (3% Black), Walworth County (1.1% Black), Rock County (4.9% Black), Waukesha County (1.6% Black), and Dane County (5.3% Black).

Jefferson County's Asian Population

646 residents of Jefferson County identify as Asian, or 0.8%. This makes the Asian share of the population of Jefferson County roughly similar to the Asian share of the population of Wisconsin (3% Asian). Of the 72 counties in Wisconsin, Jefferson County is ranked #26 in terms of Asian residents as a share of the population.

Jefferson County is more Asian than neighboring Dodge County (0.6% Asian). Jefferson County is less Asian than neighboring Walworth County (0.9% Asian), Rock County (1.2% Asian), Waukesha County (3.8% Asian), and Dane County (6.3% Asian).

Jefferson County's Hispanic Population

7,068 residents of Jefferson County identify as Hispanic, or 8.3%. This makes the Hispanic share of the population of Jefferson County roughly similar to the Hispanic share of the population of Wisconsin (7.6% Hispanic). Of the 72 counties in Wisconsin, Jefferson County is ranked #8 in terms of Hispanic residents as a share of the population.

Jefferson County is more Hispanic than neighboring Dodge County (6.1% Hispanic), Waukesha County (5.4% Hispanic), and Dane County (7.5% Hispanic). Jefferson County is less Hispanic than neighboring Walworth County (11.8% Hispanic), and Rock County (9.7% Hispanic).

Jefferson County's Native American/Other Population

427 residents of Jefferson County identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other, or 0.5%. 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 Wisconsin (1.2% Native American/Other). Of the 72 counties in Wisconsin, Jefferson County is ranked #59 in terms of Native American/Other residents as a share of the population.

Jefferson County is less Native American/Other than neighboring Dodge County (0.7% Native American/Other), Rock County (0.6% Native American/Other), and Dane County (0.6% Native American/Other).

Jefferson County's Multiracial Population

2,570 residents of Jefferson County identify as Multiracial, or 3.0%. This makes the Multiracial share of the population of Jefferson County roughly similar to the Multiracial share of the population of Wisconsin (3.5% Multiracial). Of the 72 counties in Wisconsin, Jefferson County is ranked #37 in terms of Multiracial residents as a share of the population.

Jefferson County is more Multiracial than neighboring Dodge County (2.5% Multiracial). Jefferson County is less Multiracial than neighboring Rock County (4.3% Multiracial), Waukesha County (3.2% Multiracial), and Dane County (4.3% Multiracial).

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