Wisconsin · Census place 5575125

South Milwaukee, Wisconsin

South Milwaukee is a city in Milwaukee County, Wisconsin with an estimated 20,233 residents on July 1, 2024. It is the 41st largest of 370 incorporated places of 1,000+ people in the state.

Population 2024
20,233
#41 of 370 in Wisconsin
Change since 2020
-2.6%
-539 people
Land area
4.8 sq mi
Density
4,189 / sq mi
State median 1,583
Orange pin: South Milwaukee. Shaded: its county. Dark pin: Madison.

South Milwaukee population, 2020 to 2024

South Milwaukee lost 539 residents from July 2020 to July 2024, a change of -2.6%. In the latest year it moved by -5. Among 157 Wisconsin places of 5,000 or more, that growth ranks 149th; the median place changed by +0.8%. The median place of 5,000+ in Wisconsin has 12,527 people, so South Milwaukee is 1.6 times that size.

20.8k202020.6k202120.3k202220.2k202320.2k2024
July 1 estimates. The April 2020 estimates base was 20,797. The axis starts above zero so yearly changes are visible.

South Milwaukee covers 4.83 square miles of land, for 4,189 people per square mile of land. The median Wisconsin place of 5,000+ has 1,583, so South Milwaukee is denser than the typical town.

What county South Milwaukee is in

All of South Milwaukee's residents live in Milwaukee County, which had 924,740 residents in 2024. South Milwaukee holds 2.2% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in South Milwaukee

1 ZIP Code Tabulation Area (ZCTA) overlaps South Milwaukee by at least 10% of the ZCTA's or the city's land: 53172. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a city that annexed land after 2020 may reach into ZIP codes not listed here.

Where South Milwaukee is

The Census internal point of South Milwaukee is at 42.912600, -87.862300. Madison, the capital, is 77.7 miles W in a straight line. The nearest larger place is Oak Creek, WI (38,373 people), 3.0 miles away. The nearest city of 100,000 or more is Milwaukee, WI, 11.7 miles away.

Internal point

Decimal
42.912600, -87.862300
DMS
42°54'45.36"N 87°51'44.28"W
UTM
16N 429615.6E 4751469.9N
Geohash
dp9s0sh8h
Plus code
86JJW47Q+23

Daylight in South Milwaukee

At 42.91° N, South Milwaukee gets about 15 h 21 min of daylight around the June solstice and 9 h 01 min around the December solstice, a swing of 6 h 20 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near South Milwaukee

The eight nearest incorporated places of 1,000+ in Wisconsin, measured between internal points. The closest is Cudahy, 2.4 miles away, with 17,704 people.

Questions people ask

What is the population of South Milwaukee, WI?

20,233 on July 1, 2024, in the Census Vintage 2024 estimates. That is down 539 (2.6%) from 20,772 in July 2020.

What county is South Milwaukee in?

Milwaukee County. All of its residents live in that county.

What ZIP codes cover South Milwaukee?

1 ZIP Code Tabulation Area overlaps it by at least 10% of either area: 53172.

How far is South Milwaukee from Madison?

77.7 miles (125.1 km) in a straight line, heading W from South Milwaukee.

What is the nearest larger city to South Milwaukee?

Oak Creek, WI, with 38,373 residents, 3.0 miles away between internal points.

Sources and data as of

Data as of: Census Vintage 2024 subcounty estimates (July 1, 2024), 2024 Gazetteer places, 2020 ZCTA to place relationship file.

  1. 01Census Vintage 2024 subcounty population estimates
  2. 02Census 2024 Gazetteer, places
  3. 03Census 2020 ZCTA to place relationship file
  4. 04Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.