Boundary Atlas

ZIP code 54401: Wausau, WI

ZIP code 54401 is in Wausau (64% of residents), Rib Mountain (23%) and Maine (4.9%), in Marathon County, Wisconsin. 8.1% of its residents live outside city limits. It is in Wisconsin's 7th congressional district. Its state senate districts are State Senate District 29 (95%) and State Senate District 12 (5.5%); its state house districts are Assembly District 85 (66%), Assembly District 87 (24%), Assembly District 35 (5.5%) and Assembly District 86 (5.0%).

31,727residents (2020 Census)
84.2 sq miland area
3cities and towns
1congressional district
34voting precincts

See it on the mapAll of Wisconsin

City and county

City or townShare of ZIP residents
Wausau64%
Rib Mountain23%
Maine4.9%

CountyShare of ZIP residents
Marathon County100%

Town or county subdivisionShare of ZIP residents
Wausau city64%
Rib Mountain village23%
Stettin town6.2%
Maine village4.9%
Mosinee town0.7%
Berlin town0.6%
Marathon town0.6%

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 29)Cory Tomczyk (R)95%
State Senator (State Senate District 12)Mary Felzkowski (R)5.5%
Assembly Member (Assembly District 85)Pat Snyder (R)66%
Assembly Member (Assembly District 87)Brent Jacobson (R)24%
Assembly Member (Assembly District 35)Calvin Callahan (R)5.5%
Assembly Member (Assembly District 86)John Spiros (R)5.0%

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 2995%
State Senate District 125.5%

State house districtShare of ZIP residents
Assembly District 8566%
Assembly District 8724%
Assembly District 355.5%
Assembly District 865.0%

Voting precincts

34 voting precincts overlap ZIP 54401. Map them, with each precinct's share of the ZIP's residents.

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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:54401")

ZIP 54401 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.