Boundary Atlas

ZIP code 54902: Oshkosh, WI

ZIP code 54902 is in Oshkosh (87% of residents), in Winnebago County, Wisconsin. 13% of its residents live outside city limits. It is in Wisconsin's 6th congressional district. Its state senate districts are State Senate District 18 (54%) and State Senate District 19 (46%); its state house districts are Assembly District 54 (54%) and Assembly District 55 (46%).

22,309residents (2020 Census)
35.0 sq miland area
1cities and towns
1congressional district
12voting precincts

See it on the mapAll of Wisconsin

City and county

City or townShare of ZIP residents
Oshkosh87%

CountyShare of ZIP residents
Winnebago County100%

Town or county subdivisionShare of ZIP residents
Oshkosh city87%
Black Wolf town11%
Nekimi town2.2%

Congressional district

Congressional districtShare of ZIP residents
Wisconsin's 6th congressional district (WI-06)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 1854%
State Senate District 1946%

State house districtShare of ZIP residents
Assembly District 5454%
Assembly District 5546%

Voting precincts

12 voting precincts overlap ZIP 54902. Map them, with each precinct's share of the ZIP's residents.

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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:54902")

ZIP 54902 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.