ZIP code 53818: Platteville, WI
ZIP code 53818 is in Platteville (75% of residents), in Grant County (96%), Lafayette County (4.1%) and Iowa County (0.3%), Wisconsin. 25% of its residents live outside city limits. It is in Wisconsin's 3rd congressional district (96%) and Wisconsin's 2nd congressional district (4.4%). Its state senate district is State Senate District 17; its state house districts are Assembly District 49 (95%) and Assembly District 51 (4.6%).
See it on the mapAll of Wisconsin
City and county
| City or town | Share of ZIP residents |
|---|---|
| Platteville | 75% |
| County | Share of ZIP residents |
|---|---|
| Grant County | 96% |
| Lafayette County | 4.1% |
| Iowa County | 0.3% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Platteville city | 75% |
| Platteville town | 9.6% |
| Lima town | 4.7% |
| Belmont town | 3.2% |
| Smelser town | 2.3% |
| Harrison town | 2.3% |
| Ellenboro town | 1.2% |
| Elk Grove town | 0.9% |
| Paris town | 0.4% |
| Mifflin town | 0.3% |
| Clifton town | 0.2% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Wisconsin's 3rd congressional district (WI-03) | 96% |
| Wisconsin's 2nd congressional district (WI-02) | 4.4% |
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 |
|---|---|---|---|
| U.S. Representative (WI-03) | Derrick Van Orden (R) | 202-225-5506 | 96% |
| U.S. Representative (WI-02) | Mark Pocan (D) | 202-225-2906 | 4.4% |
| 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 17) | Howard Marklein (R) | 100% | |
| Assembly Member (Assembly District 49) | Travis Tranel (R) | 95% | |
| Assembly Member (Assembly District 51) | Todd Novak (R) | 4.6% |
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).
Local government
- Platteville website: http://www.platteville.org/
- Platteville laws: search for the Platteville, Wisconsin code of ordinances
- Grant County website: http://www.co.grant.wi.gov
- Grant County laws: search for the Grant County, Wisconsin code of ordinances
- Lafayette County website: http://www.co.lafayette.wi.gov
- Lafayette County laws: search for the Lafayette County, Wisconsin code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 17 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| Assembly District 49 | 95% |
| Assembly District 51 | 4.6% |
Voting precincts
21 voting precincts overlap ZIP 53818. 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:53818")
ZIP 53818 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.