Waukesha County Demographics

A map of Waukesha County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	350,148	347,922	85.0%	85.5%
Hispanic	23,650	21,835	5.7%	5.4%
Asian	15,980	15,616	3.9%	3.8%
Multiracial	13,310	12,891	3.2%	3.2%
Black	6,303	6,648	1.5%	1.6%
Native American/Other	2,371	2,066	0.6%	0.5%

Waukesha County, Wisconsin has an estimated population of 411,762, a slight increase from the 406,978 recorded in the 2020 Census. The population is 85.0% White, 5.7% Hispanic, 3.9% Asian, 3.2% Multiracial, 1.5% Black, and 0.6% Native American/Other. This demographic dot map shows the population of Waukesha County, with one dot drawn for each person counted by the Census, color-coded by race.

Waukesha has become slightly more racially diverse since the 2020 Census. It is considerably less diverse than Wisconsin overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Waukesha County, that probability was 26.4% in 2020 and 27.1% in the most recent ACS estimates.

Waukesha County is ranked the 3rd most populous county in Wisconsin, out of 72 counties. Waukesha County was ranked the 3rd most populous county in the 2020 Census.

Waukesha County's White Population

350,148 residents of Waukesha County, or 85.0% of the population, identify as White. The share of White residents in Waukesha County is higher than in Wisconsin overall, where 78.6% of the population is White. Waukesha County ranks 53rd statewide in terms of White residents as a share of the population, out of 72 counties.

Since the 2020 Census, Waukesha County's White population has remained roughly the same. White residents' share of Waukesha County's population has decreased from 85.5% to 85.0%.

Waukesha County is more White than neighboring Walworth County (83.1% White), and Racine County (68.6% White). Waukesha County is less White than neighboring Washington County (90.2% White), Jefferson County (87% White), and Dodge County (87.3% White).

Waukesha County's Black Population

6,303 residents of Waukesha County, or 1.5% of the population, identify as Black. The share of Black residents in Waukesha County is slightly lower than in Wisconsin overall, where 5.9% of the population is Black. Waukesha County ranks 16th statewide in terms of Black residents as a share of the population, out of 72 counties.

Since the 2020 Census, Waukesha County's Black population has declined by an estimated 5.2%. Black residents' share of Waukesha County's population has remained roughly unchanged at 1.5%.

Waukesha County is more Black than neighboring Washington County (1.3% Black), Walworth County (0.7% Black), and Jefferson County (0.9% Black). Waukesha County is less Black than neighboring Dodge County (2.5% Black), and Racine County (10.3% Black).

Waukesha County's Asian Population

15,980 residents of Waukesha County, or 3.9% of the population, identify as Asian. The share of Asian residents in Waukesha County is comparable to the share in Wisconsin overall, where 2.9% of the population is Asian. Waukesha County ranks 7th statewide in terms of Asian residents as a share of the population, out of 72 counties.

Since the 2020 Census, Waukesha County's Asian population has grown by an estimated 2.3%. Asian residents' share of Waukesha County's population has remained roughly unchanged at 3.9%.

Waukesha County is more Asian than neighboring Washington County (1.4% Asian), Walworth County (0.8% Asian), Jefferson County (0.6% Asian), Dodge County (0.5% Asian), and Racine County (1.1% Asian).

Waukesha County's Hispanic Population

23,650 residents of Waukesha County, or 5.7% of the population, identify as Hispanic. The share of Hispanic residents in Waukesha County is slightly lower than in Wisconsin overall, where 8% of the population is Hispanic. Waukesha County ranks 19th statewide in terms of Hispanic residents as a share of the population, out of 72 counties.

Since the 2020 Census, Waukesha County's Hispanic population has grown by an estimated 8.3%. Hispanic residents' share of Waukesha County's population has remained roughly unchanged at 5.7%.

Waukesha County is more Hispanic than neighboring Washington County (3.8% Hispanic). Waukesha County is less Hispanic than neighboring Walworth County (12.1% Hispanic), Jefferson County (8.5% Hispanic), Dodge County (6.7% Hispanic), and Racine County (15.1% Hispanic).

Waukesha County's Native American/Other Population

2,371 residents of Waukesha County, or 0.6% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Waukesha County is comparable to the share in Wisconsin overall, where 0.9% of the population is Native American/Other. Waukesha County ranks 58th statewide in terms of Native American/Other residents as a share of the population, out of 72 counties.

Since the 2020 Census, Waukesha County's Native American/Other population has grown by an estimated 14.8%. Native American/Other residents' share of Waukesha County's population has remained roughly unchanged at 0.6%.

Waukesha County is more Native American/Other than neighboring Washington County (0.4% Native American/Other), Walworth County (0.4% Native American/Other), Jefferson County (0.3% Native American/Other), and Dodge County (0.5% Native American/Other).

Waukesha County's Multiracial Population

13,310 residents of Waukesha County, or 3.2% of the population, identify as Multiracial. The share of Multiracial residents in Waukesha County is comparable to the share in Wisconsin overall, where 3.7% of the population is Multiracial. Waukesha County ranks 28th statewide in terms of Multiracial residents as a share of the population, out of 72 counties.

Since the 2020 Census, Waukesha County's Multiracial population has grown by an estimated 3.3%. Multiracial residents' share of Waukesha County's population has remained roughly unchanged at 3.2%.

Waukesha County is more Multiracial than neighboring Washington County (2.9% Multiracial), Walworth County (2.8% Multiracial), Jefferson County (2.7% Multiracial), and Dodge County (2.5% Multiracial). Waukesha County is less Multiracial than neighboring Racine County (4.2% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.