South Milwaukee, Wisconsin Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of South Milwaukee, Wisconsin is 20,547 as of the 2023 American Community Survey, making it the 40th-largest city in Wisconsin. The median household income is $70,146, the median home value is $216,400, and the median age is 40.9.
The population has declined 4.4% since 2010 (21,163 → 20,233).
20,547
Population
4258
People / sq mi
$70,146
Median Income
$216,400
Median Home Value
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South Milwaukee covers 4.8 sq mi of land at 4258 people per square mile.
About South Milwaukee, WI
South Milwaukee is distinguished by its share of foreign-born residents, 14.3% of the population. South Milwaukee is a city in Wisconsin with a population of 20,547. It ranks #40 among cities in Wisconsin by population.
Median household income is $70,146, below the US median of $78,538. Poverty runs at 9.6%, below the national 12.4%. Homes are comparatively cheap — a median value of $216,400, with typical rent around $1,014.
Degree attainment is mid-range for US cities: 27.7% of adults hold a four-year degree, below the national 35.0%. About 11.4% of the workforce is home-based, below the national 14.0%, and the average commute runs about 25 minutes each way.
South Milwaukee city Population History (2010-2024)
The city of South Milwaukee city had a population of 21,163 in 2010 and 20,233 in 2024, a -4.4% growth over 14 years. The peak was 21,279 in 2014. Average annual growth rate: -0.32%.
20,233
Population (2024)
21,163
Population (2010)
21,279
Peak (2014)
-0.32%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 21,163 |
| 2011 | 21,181 |
| 2012 | 21,221 |
| 2013 | 21,260 |
| 2014 | 21,279 |
| 2015 | 21,252 |
| 2016 | 21,123 |
| 2017 | 20,928 |
| 2018 | 20,781 |
| 2019 | 20,696 |
| 2020 | 20,772 |
| 2021 | 20,567 |
| 2022 | 20,347 |
| 2023 | 20,238 |
| 2024 | 20,233 |
Race & Ethnicity
| White | 84.4% |
| Black or African American | 2.4% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 2.9% |
| Two or More Races | 0.0% |
Economy & Income
$70,146
Median Household Income
$36,428
Per Capita Income
9.6%
Poverty Rate
2.2%
Unemployment Rate
Housing
$216,400
Median Home Value
$1,014
Median Rent
66.8%
Owner-Occupied
Education
93.8%
High School+
27.7%
Bachelor's+
Commute
1.0%
Drive Alone
78.2%
Public Transit
11.4%
Work From Home
25.0 min
Avg Commute
Community Profile
14.3%
Foreign Born
88.3%
Non-English at Home
7.6%
Veterans
14.4%
With Disability
95.2%
Health Insurance
94.1%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 25.0% |
| Manufacturing | 22.2% |
| Finance, Insurance & Real Estate | 8.9% |
| Education, Health Care & Social Services | 7.1% |
| Information | 6.1% |
| Retail Trade | 5.9% |
| Construction | 5.0% |
| Arts, Entertainment & Food Services | 4.0% |
| Public Administration | 2.7% |
| Transportation & Warehousing | 1.4% |
| Agriculture & Mining | 0.3% |
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Frequently Asked Questions
South Milwaukee, Wisconsin has a population of 20,547 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 40th-largest city in Wisconsin.
The median household income in South Milwaukee, Wisconsin is $70,146, with 9.6% of residents living below the federal poverty level.
The median home value in South Milwaukee, Wisconsin is $216,400, with median monthly rent at $1,014 and a homeownership rate of 66.8%.
The median age in South Milwaukee, Wisconsin is 40.9 years. The population is 49.6% male and 50.4% female.
The population has declined 4.4% since 2010 (21,163 → 20,233).
South Milwaukee city, WI Climate
South Milwaukee city, WI has an average annual temperature of 8.2°C (47°F) and receives about 843 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
8.2°C
Avg Temp
843
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -7° / 20° | 42 mm |
| February | -4° / 25° | 34 mm |
| March | 1° / 34° | 56 mm |
| April | 7° / 45° | 90 mm |
| May | 13° / 55° | 77 mm |
| June | 18° / 65° | 92 mm |
| July | 22° / 71° | 90 mm |
| August | 21° / 69° | 98 mm |
| September | 17° / 62° | 90 mm |
| October | 10° / 51° | 60 mm |
| November | 3° / 38° | 63 mm |
| December | -3° / 26° | 51 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit South Milwaukee city, WI
The most comfortable months to visit South Milwaukee city, WI are typically July, August and June, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 27°C high). The coldest is January (near -11°C low). August is usually the wettest month.
Where to stay near South Milwaukee
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.