ZIP code 54923: Berlin, WI
ZIP code 54923 is in Berlin (65% of residents), in Green Lake County (79%), Waushara County (18%) and Winnebago County (2.6%), Wisconsin. 35% of its residents live outside city limits. It is in Wisconsin's 6th congressional district. Its state senate districts are State Senate District 13 (82%) and State Senate District 19 (18%); its state house districts are Assembly District 39 (82%) and Assembly District 57 (18%).
See it on the mapAll of Wisconsin
City and county
| City or town | Share of ZIP residents |
|---|---|
| Berlin | 65% |
| County | Share of ZIP residents |
|---|---|
| Green Lake County | 79% |
| Waushara County | 18% |
| Winnebago County | 2.6% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Berlin city | 64% |
| Berlin town | 12% |
| Aurora town | 11% |
| Poy Sippi town | 3.8% |
| Seneca town | 3.6% |
| Warren town | 2.1% |
| Nepeuskun town | 1.9% |
| Berlin city | 1.0% |
| Rushford town | 0.7% |
| St. Marie town | <0.1% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Wisconsin's 6th congressional district (WI-06) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| Mayor | Joel Bruessel | 65% | |
| U.S. Representative (WI-06) | Glenn Grothman (R) | 202-225-2476 | 100% |
| 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 13) | John Jagler (R) | 82% | |
| State Senator (State Senate District 19) | Rachael Cabral-Guevara (R) | 18% | |
| Assembly Member (Assembly District 39) | Alex Dallman (R) | 82% | |
| Assembly Member (Assembly District 57) | Kevin Petersen (R) | 18% |
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
- Berlin website: http://cityofberlin.net/
- Berlin laws: search for the Berlin, Wisconsin code of ordinances
- Green Lake County website: http://www.co.green-lake.wi.us
- Green Lake County laws: search for the Green Lake County, Wisconsin code of ordinances
- Waushara County laws: search for the Waushara County, Wisconsin code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 13 | 82% |
| State Senate District 19 | 18% |
| State house district | Share of ZIP residents |
|---|---|
| Assembly District 39 | 82% |
| Assembly District 57 | 18% |
Voting precincts
19 voting precincts overlap ZIP 54923. 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:54923")
ZIP 54923 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.