South Milwaukee, WI Demographics

A map of South Milwaukee's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	15,790	16,062	77.2%	77.2%
Hispanic	2,489	2,704	12.2%	13.0%
Multiracial	1,239	822	6.1%	4.0%
Black	501	684	2.5%	3.3%
Asian	265	318	1.3%	1.5%
Native American/Other	158	205	0.8%	1.0%

South Milwaukee, Wisconsin has an estimated population of 20,442, a slight decrease from the 20,795 recorded in the 2020 Census. The population is 77.2% White, 12.2% Hispanic, 6.1% Multiracial, 2.5% Black, 1.3% Asian, and 0.8% Native American/Other. This demographic dot map shows the population of South Milwaukee, with one dot drawn for each person counted by the Census, color-coded by race.

South Milwaukee is about as racially diverse as it was in the 2020 Census. It is more 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 South Milwaukee, that probability was 38.4% in 2020 and 38.4% in the most recent ACS estimates.

South Milwaukee is ranked the 41st 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). South Milwaukee was ranked the 40th most populous place in the 2020 Census.

South Milwaukee's White Population

15,790 residents of South Milwaukee, or 77.2% of the population, identify as White. The share of White residents in South Milwaukee is comparable to the share in Wisconsin overall, where 78.6% of the population is White. South Milwaukee ranks 727th statewide in terms of White residents as a share of the population, out of 808 places.

Since the 2020 Census, South Milwaukee's White population has declined by an estimated 1.7%. White residents' share of South Milwaukee's population has remained roughly unchanged at 77.2%.

South Milwaukee is more White than neighboring Oak Creek (73% White). South Milwaukee is less White than neighboring Cudahy (77.9% White), St. Francis (77.7% White), Caledonia (78.1% White), and Greendale (79.5% White).

South Milwaukee's Black Population

501 residents of South Milwaukee, or 2.5% of the population, identify as Black. The share of Black residents in South Milwaukee is slightly lower than in Wisconsin overall, where 5.9% of the population is Black. South Milwaukee ranks 46th statewide in terms of Black residents as a share of the population, out of 808 places.

Since the 2020 Census, South Milwaukee's Black population has declined by an estimated 26.8%. Black residents' share of South Milwaukee's population has decreased from 3.3% to 2.5%.

South Milwaukee is more Black than neighboring Caledonia (2.4% Black), and Greendale (1.1% Black). South Milwaukee is less Black than neighboring Cudahy (2.8% Black), Oak Creek (4.4% Black), and St. Francis (6.6% Black).

South Milwaukee's Asian Population

265 residents of South Milwaukee, or 1.3% of the population, identify as Asian. The share of Asian residents in South Milwaukee is comparable to the share in Wisconsin overall, where 2.9% of the population is Asian. South Milwaukee ranks 127th statewide in terms of Asian residents as a share of the population, out of 808 places.

Since the 2020 Census, South Milwaukee's Asian population has declined by an estimated 16.7%. Asian residents' share of South Milwaukee's population has remained roughly unchanged at 1.3%.

South Milwaukee is less Asian than neighboring Cudahy (2% Asian), Oak Creek (6.1% Asian), St. Francis (1.4% Asian), Caledonia (1.4% Asian), and Greendale (4.2% Asian).

South Milwaukee's Hispanic Population

2,489 residents of South Milwaukee, or 12.2% of the population, identify as Hispanic. The share of Hispanic residents in South Milwaukee is slightly higher than in Wisconsin overall, where 8% of the population is Hispanic. South Milwaukee ranks 46th statewide in terms of Hispanic residents as a share of the population, out of 808 places.

Since the 2020 Census, South Milwaukee's Hispanic population has declined by an estimated 8.0%. Hispanic residents' share of South Milwaukee's population has decreased from 13.0% to 12.2%.

South Milwaukee is more Hispanic than neighboring Cudahy (11.4% Hispanic), St. Francis (11.6% Hispanic), and Greendale (11.3% Hispanic).

South Milwaukee's Native American/Other Population

158 residents of South Milwaukee, or 0.8% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in South Milwaukee is comparable to the share in Wisconsin overall, where 0.9% of the population is Native American/Other. South Milwaukee ranks 230th statewide in terms of Native American/Other residents as a share of the population, out of 808 places.

Since the 2020 Census, South Milwaukee's Native American/Other population has declined by an estimated 22.9%. Native American/Other residents' share of South Milwaukee's population has remained roughly unchanged at 0.8%.

South Milwaukee is more Native American/Other than neighboring Cudahy (0.7% Native American/Other), Oak Creek (0.4% Native American/Other), St. Francis (0.5% Native American/Other), and Greendale (0.3% Native American/Other). South Milwaukee is less Native American/Other than neighboring Caledonia (1% Native American/Other).

South Milwaukee's Multiracial Population

1,239 residents of South Milwaukee, or 6.1% of the population, identify as Multiracial. The share of Multiracial residents in South Milwaukee is slightly higher than in Wisconsin overall, where 3.7% of the population is Multiracial. South Milwaukee ranks 205th statewide in terms of Multiracial residents as a share of the population, out of 808 places.

Since the 2020 Census, South Milwaukee's Multiracial population has grown by an estimated 50.7%. Multiracial residents' share of South Milwaukee's population has increased from 4.0% to 6.1%.

South Milwaukee is more Multiracial than neighboring Cudahy (5.2% Multiracial), Oak Creek (3.9% Multiracial), St. Francis (2.2% Multiracial), Caledonia (4.9% Multiracial), and Greendale (3.6% 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.