ZIP code 54151: Niagara, WI
ZIP code 54151 is in Niagara (46% of residents), in Marinette County (73%) and Florence County (27%), Wisconsin. 54% of its residents live outside city limits. It is in Wisconsin's 8th congressional district (73%) and Wisconsin's 7th congressional district (27%). Its state senate district is State Senate District 12; its state house district is Assembly District 36.
See it on the mapAll of Wisconsin
City and county
| City or town | Share of ZIP residents |
|---|---|
| Niagara | 46% |
| County | Share of ZIP residents |
|---|---|
| Marinette County | 73% |
| Florence County | 27% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Niagara city | 46% |
| Aurora town | 27% |
| Niagara town | 24% |
| Pembine town | 3.4% |
| Homestead town | 0.3% |
| Dunbar town | land only |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Wisconsin's 8th congressional district (WI-08) | 73% |
| Wisconsin's 7th congressional district (WI-07) | 27% |
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-08) | Tony Wied (R) | 202-225-5665 | 73% |
| U.S. Representative (WI-07) | Thomas P. Tiffany (R) | 202-225-3365 | 27% |
| 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 12) | Mary Felzkowski (R) | 100% | |
| Assembly Member (Assembly District 36) | Jeff Mursau (R) | 100% |
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
- Niagara website: https://www.cityofniagara.org/
- Niagara laws: search for the Niagara, Wisconsin code of ordinances
- Marinette County website: http://www.marinettecounty.com
- Marinette County laws: search for the Marinette County, Wisconsin code of ordinances
- Florence County laws: search for the Florence County, Wisconsin code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 12 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| Assembly District 36 | 100% |
Voting precincts
10 voting precincts overlap ZIP 54151. 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://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:zcta:54151")
ZIP 54151 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.