Boundary Atlas

ZIP code 54403: Wausau, WI

ZIP code 54403 is in Wausau (80% of residents), in Marathon County, Wisconsin. 20% of its residents live outside city limits. It is in Wisconsin's 7th congressional district. Its state senate districts are State Senate District 29 (90%) and State Senate District 12 (9.8%); its state house districts are Assembly District 85 (90%), Assembly District 35 (9.8%) and Assembly District 87 (0.1%).

24,712residents (2020 Census)
133.6 sq miland area
3cities and towns
1congressional district
21voting precincts

See it on the mapAll of Wisconsin

City and county

City or townShare of ZIP residents
Wausau80%
Weston0.6%
Maine<0.1%

CountyShare of ZIP residents
Marathon County100%

Town or county subdivisionShare of ZIP residents
Wausau city80%
Wausau town8.7%
Texas town5.9%
Hewitt town2.4%
Easton town1.5%
Weston town1.1%
Weston village0.6%
Ringle town0.1%
Maine village<0.1%

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)90%
State Senator (State Senate District 12)Mary Felzkowski (R)9.8%
Assembly Member (Assembly District 85)Pat Snyder (R)90%
Assembly Member (Assembly District 35)Calvin Callahan (R)9.8%
Assembly Member (Assembly District 87)Brent Jacobson (R)0.1%

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 2990%
State Senate District 129.8%

State house districtShare of ZIP residents
Assembly District 8590%
Assembly District 359.8%
Assembly District 870.1%

Voting precincts

21 voting precincts overlap ZIP 54403. 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:54403")

ZIP 54403 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.