Boundary Atlas

ZIP code 54648: Norwalk, WI

ZIP code 54648 is in Norwalk (36% of residents), in Monroe County, Wisconsin. 64% of its residents live outside city limits. It is in Wisconsin's 3rd congressional district. Its state senate districts are State Senate District 32 (91%) and State Senate District 24 (9.2%); its state house districts are Assembly District 95 (91%) and Assembly District 70 (9.2%).

1,702residents (2020 Census)
73.8 sq miland area
1cities and towns
1congressional district
10voting precincts

See it on the mapAll of Wisconsin

City and county

City or townShare of ZIP residents
Norwalk36%

CountyShare of ZIP residents
Monroe County100%

Town or county subdivisionShare of ZIP residents
Norwalk village36%
Ridgeville town24%
Sheldon town20%
Adrian town7.4%
Wells town7.1%
Jefferson town4.5%
Wilton town1.5%
Tomah town0.2%

Congressional district

Congressional districtShare of ZIP residents
Wisconsin's 3rd congressional district (WI-03)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (WI-03)Derrick Van Orden (R)202-225-5506100%
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 32)Brad Pfaff (Democratic)91%
State Senator (State Senate District 24)Patrick Testin (R)9.2%
Assembly Member (Assembly District 95)Jill Billings (Democratic)91%
Assembly Member (Assembly District 70)Nancy VanderMeer (R)9.2%

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 3291%
State Senate District 249.2%

State house districtShare of ZIP residents
Assembly District 9591%
Assembly District 709.2%

Voting precincts

10 voting precincts overlap ZIP 54648. 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:54648")

ZIP 54648 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.