Boundary Atlas

ZIP code 53403: Racine, WI

ZIP code 53403 is in Racine (78% of residents), Mount Pleasant (20%) and Somers (2.1%), in Racine County (98%) and Kenosha County (2.1%), Wisconsin. It is in Wisconsin's 1st congressional district. Its state senate districts are State Senate District 22 (75%) and State Senate District 21 (25%); its state house districts are Assembly District 66 (72%), Assembly District 62 (25%) and Assembly District 64 (2.1%).

26,269residents (2020 Census)
10.2 sq miland area
3cities and towns
1congressional district
30voting precincts

See it on the mapAll of Wisconsin

City and county

City or townShare of ZIP residents
Racine78%
Mount Pleasant20%
Somers2.1%

CountyShare of ZIP residents
Racine County98%
Kenosha County2.1%

Town or county subdivisionShare of ZIP residents
Racine city78%
Mount Pleasant village20%
Somers village2.1%

Congressional district

Congressional districtShare of ZIP residents
Wisconsin's 1st congressional district (WI-01)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 2275%
State Senate District 2125%

State house districtShare of ZIP residents
Assembly District 6672%
Assembly District 6225%
Assembly District 642.1%

Voting precincts

30 voting precincts overlap ZIP 53403. Map them, with each precinct's share of the ZIP's residents.

Get this in your AI agent

Your agent can get these cities, counties, districts and precincts with their shares, and their GeoJSON boundaries, from Boundary Atlas. Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

related_geographies(id="us:zcta:53403")

ZIP 53403 here is the Census Bureau's ZIP Code Tabulation Area, which approximates the USPS ZIP Code; PO-box-only ZIPs have none. Districts are the maps in force for the November 3, 2026 election.