Janesville, WI Demographics

A map of Janesville's Population by Race

Janesville, Wisconsin has an estimated population of 66,030, a less than 1% change from the 65,615 recorded in the 2020 Census. The population is 83.8% White, 7.8% Hispanic, 3.5% Multiracial, 3.0% Black, 1.6% Asian, and 0.4% Native American/Other. This demographic dot map shows the population of Janesville, with one dot drawn for each person counted by the Census, color-coded by race.

Janesville has become less 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 Janesville, that probability was 30.3% in 2020 and 28.9% in the most recent ACS estimates.

Janesville is ranked the 10th most populous place in Wisconsin, out of 808 places. This ranking is based on the Census definition of a place, which includes incorporated places like cities, towns, and villages, as well as unincorporated census-designated places (CDPs). Janesville was ranked the 10th most populous place in the 2020 Census.

Janesville's White Population

55,327 residents of Janesville, or 83.8% of the population, identify as White. The share of White residents in Janesville is higher than in Wisconsin overall, where 78.6% of the population is White. Janesville ranks 673rd statewide in terms of White residents as a share of the population, out of 808 places.

Since the 2020 Census, Janesville's White population has grown by an estimated 1.6%. White residents' share of Janesville's population has increased from 83.0% to 83.8%.

Janesville is more White than neighboring Beloit (59.4% White). Janesville is less White than neighboring Milton (86.3% White), Shopiere (100% White), and Hanover (94.6% White).

Janesville's Black Population

1,963 residents of Janesville, or 3.0% of the population, identify as Black. The share of Black residents in Janesville is slightly lower than in Wisconsin overall, where 5.9% of the population is Black. Janesville ranks 47th statewide in terms of Black residents as a share of the population, out of 808 places.

Since the 2020 Census, Janesville's Black population has declined by an estimated 8.7%. Black residents' share of Janesville's population has remained roughly unchanged at 3.0%.

Janesville is more Black than neighboring Milton (0% Black), Shopiere (0% Black), Edgerton (0.8% Black), and Hanover (0% Black). Janesville is less Black than neighboring Beloit (13.9% Black).

Janesville's Asian Population

1,038 residents of Janesville, or 1.6% of the population, identify as Asian. The share of Asian residents in Janesville is comparable to the share in Wisconsin overall, where 2.9% of the population is Asian. Janesville ranks 118th statewide in terms of Asian residents as a share of the population, out of 808 places.

Since the 2020 Census, Janesville's Asian population has declined by an estimated 2.1%. Asian residents' share of Janesville's population has remained roughly unchanged at 1.6%.

Janesville is more Asian than neighboring Milton (0% Asian), Shopiere (0% Asian), Beloit (0.8% Asian), Edgerton (1.5% Asian), and Hanover (0% Asian).

Janesville's Hispanic Population

5,124 residents of Janesville, or 7.8% of the population, identify as Hispanic. The share of Hispanic residents in Janesville is comparable to the share in Wisconsin overall, where 8% of the population is Hispanic. Janesville ranks 123rd statewide in terms of Hispanic residents as a share of the population, out of 808 places.

Since the 2020 Census, Janesville's Hispanic population has grown by an estimated 8.4%. Hispanic residents' share of Janesville's population has increased from 7.2% to 7.8%.

Janesville is more Hispanic than neighboring Shopiere (0% Hispanic), Edgerton (6.2% Hispanic), and Hanover (1.5% Hispanic). Janesville is less Hispanic than neighboring Milton (8.9% Hispanic), and Beloit (21% Hispanic).

Janesville's Native American/Other Population

265 residents of Janesville, or 0.4% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Janesville is comparable to the share in Wisconsin overall, where 0.9% of the population is Native American/Other. Janesville ranks 472nd statewide in terms of Native American/Other residents as a share of the population, out of 808 places.

Since the 2020 Census, Janesville's Native American/Other population has declined by an estimated 19.2%. Native American/Other residents' share of Janesville's population has remained roughly unchanged at 0.4%.

Janesville is more Native American/Other than neighboring Milton (0.1% Native American/Other), Shopiere (0% Native American/Other), Beloit (0.1% Native American/Other), and Hanover (0% Native American/Other). Janesville is less Native American/Other than neighboring Edgerton (0.5% Native American/Other).

Janesville's Multiracial Population

2,313 residents of Janesville, or 3.5% of the population, identify as Multiracial. The share of Multiracial residents in Janesville is comparable to the share in Wisconsin overall, where 3.7% of the population is Multiracial. Janesville ranks 125th statewide in terms of Multiracial residents as a share of the population, out of 808 places.

Since the 2020 Census, Janesville's Multiracial population has declined by an estimated 20.1%. Multiracial residents' share of Janesville's population has decreased from 4.4% to 3.5%.

Janesville is more Multiracial than neighboring Shopiere (0% Multiracial). Janesville is less Multiracial than neighboring Milton (4.6% Multiracial), Beloit (4.9% Multiracial), Edgerton (7.2% Multiracial), and Hanover (3.8% 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.