Boundary Atlas

ZIP code 54966: Plainfield, WI

ZIP code 54966 is in Plainfield (47% of residents), in Waushara County (88%), Portage County (11%) and Adams County (1.0%), Wisconsin. 53% of its residents live outside city limits. It is in Wisconsin's 6th congressional district (88%) and Wisconsin's 3rd congressional district (12%). Its state senate districts are State Senate District 19 (91%) and State Senate District 24 (8.8%); its state house districts are Assembly District 57 (91%) and Assembly District 71 (8.8%).

1,973residents (2020 Census)
81.5 sq miland area
1cities and towns
2congressional districts
6voting precincts

See it on the mapAll of Wisconsin

City and county

City or townShare of ZIP residents
Plainfield47%

CountyShare of ZIP residents
Waushara County88%
Portage County11%
Adams County1.0%

Town or county subdivisionShare of ZIP residents
Plainfield village47%
Plainfield town25%
Oasis town17%
Pine Grove town7.9%
Almond town3.0%
Leola town1.0%

Congressional districts

Congressional districtShare of ZIP residents
Wisconsin's 6th congressional district (WI-06)88%
Wisconsin's 3rd congressional district (WI-03)12%

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

OfficeMemberContactShare of residents
U.S. Representative (WI-06)Glenn Grothman (R)202-225-247688%
U.S. Representative (WI-03)Derrick Van Orden (R)202-225-550612%
U.S. SenatorRon Johnson (R)202-224-5323 · contact formstatewide
U.S. SenatorTammy Baldwin (D)202-224-5653 · contact formstatewide
State Senator (State Senate District 19)Rachael Cabral-Guevara (R)91%
State Senator (State Senate District 24)Patrick Testin (R)8.8%
Assembly Member (Assembly District 57)Kevin Petersen (R)91%
Assembly Member (Assembly District 71)Vinnie Miresse (Democratic)8.8%

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

State legislative districts

State senate districtShare of ZIP residents
State Senate District 1991%
State Senate District 248.8%

State house districtShare of ZIP residents
Assembly District 5791%
Assembly District 718.8%

Voting precincts

6 voting precincts overlap ZIP 54966. 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:54966")

ZIP 54966 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.