Boundary Atlas

ZIP code 54420: Fremont, WI

ZIP code 54420 is in Chili (16% of residents), in Clark County (94%) and Wood County (5.7%), Wisconsin. 84% of its residents live outside city limits. It is in Wisconsin's 7th congressional district. Its state senate districts are State Senate District 23 (94%) and State Senate District 29 (5.7%); its state house districts are Assembly District 69 (94%) and Assembly District 86 (5.7%).

1,299residents (2020 Census)
40.4 sq miland area
1cities and towns
1congressional district
6voting precincts

See it on the mapAll of Wisconsin

City and county

City or townShare of ZIP residents
Chili16%

CountyShare of ZIP residents
Clark County94%
Wood County5.7%

Town or county subdivisionShare of ZIP residents
Fremont town76%
Lynn town17%
Rock town5.7%
Sherman town1.3%

Congressional district

Congressional districtShare of ZIP residents
Wisconsin's 7th congressional district (WI-07)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (WI-07)Thomas P. Tiffany (R)202-225-3365100%
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 23)Jesse James (R)94%
State Senator (State Senate District 29)Cory Tomczyk (R)5.7%
Assembly Member (Assembly District 69)Karen Hurd (R)94%
Assembly Member (Assembly District 86)John Spiros (R)5.7%

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 2394%
State Senate District 295.7%

State house districtShare of ZIP residents
Assembly District 6994%
Assembly District 865.7%

Voting precincts

6 voting precincts overlap ZIP 54420. 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:54420")

ZIP 54420 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.