ZIP code 54904: Oshkosh, WI
ZIP code 54904 is in Oshkosh (50% of residents), in Winnebago County (100%) and Fond du Lac County (<0.1%), Wisconsin. 50% of its residents live outside city limits. It is in Wisconsin's 6th congressional district (100%) and Wisconsin's 8th congressional district (0.2%). Its state senate districts are State Senate District 19 (61%), State Senate District 18 (39%) and State Senate District 13 (<0.1%); its state house districts are Assembly District 55 (61%), Assembly District 54 (39%) and Assembly District 39 (<0.1%).
See it on the mapAll of Wisconsin
City and county
| City or town | Share of ZIP residents |
|---|---|
| Oshkosh | 50% |
| Butte des Morts | 0.5% |
| County | Share of ZIP residents |
|---|---|
| Winnebago County | 100% |
| Fond du Lac County | <0.1% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Oshkosh city | 50% |
| Algoma town | 31% |
| Oshkosh town | 5.2% |
| Nekimi town | 3.6% |
| Vinland town | 3.4% |
| Utica town | 3.0% |
| Omro town | 2.9% |
| Clayton town | 0.8% |
| Winneconne town | 0.2% |
| Eldorado town | <0.1% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Wisconsin's 6th congressional district (WI-06) | 100% |
| Wisconsin's 8th congressional district (WI-08) | 0.2% |
This ZIP is split between districts. A mailing address in it could be in either; the map or locate_point gives the district for an exact address.
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| Mayor | Matt Mugerauer | 50% | |
| U.S. Representative (WI-06) | Glenn Grothman (R) | 202-225-2476 | 100% |
| U.S. Representative (WI-08) | Tony Wied (R) | 202-225-5665 | 0.2% |
| U.S. Senator | Ron Johnson (R) | 202-224-5323 · contact form | statewide |
| U.S. Senator | Tammy Baldwin (D) | 202-224-5653 · contact form | statewide |
| State Senator (State Senate District 19) | Rachael Cabral-Guevara (R) | 61% | |
| State Senator (State Senate District 18) | Kristin Dassler-Alfheim (Democratic) | 39% | |
| State Senator (State Senate District 13) | John Jagler (R) | <0.1% | |
| Assembly Member (Assembly District 55) | Gus Gustafson (R) | 61% | |
| Assembly Member (Assembly District 54) | Lori Palmeri (Democratic) | 39% | |
| Assembly Member (Assembly District 39) | Alex Dallman (R) | <0.1% |
From Wikidata (community-maintained); confirm on the city's website.
Officials serving now (members of Congress until January 3, 2027). Sources: State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0); Mayors: Wikidata (CC0).
Local government
- Oshkosh laws: search for the Oshkosh, Wisconsin code of ordinances
- Winnebago County website: http://www.co.winnebago.wi.us
- Winnebago County laws: search for the Winnebago County, Wisconsin code of ordinances
- Fond du Lac County website: http://www.fdlco.wi.gov
- Fond du Lac County laws: search for the Fond du Lac County, Wisconsin code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 19 | 61% |
| State Senate District 18 | 39% |
| State Senate District 13 | <0.1% |
| State house district | Share of ZIP residents |
|---|---|
| Assembly District 55 | 61% |
| Assembly District 54 | 39% |
| Assembly District 39 | <0.1% |
Voting precincts
34 voting precincts overlap ZIP 54904. 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:54904")
ZIP 54904 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.