Boundary Atlas

ZIP code 54840: Grantsburg, WI

ZIP code 54840 is in Grantsburg (28% of residents), in Burnett County (99%) and Polk County (1.5%), Wisconsin. 72% of its residents live outside city limits. It is in Wisconsin's 7th congressional district. Its state senate district is State Senate District 25; its state house district is Assembly District 75.

4,702residents (2020 Census)
255.2 sq miland area
1cities and towns
1congressional district
16voting precincts

See it on the mapAll of Wisconsin

City and county

City or townShare of ZIP residents
Grantsburg28%

CountyShare of ZIP residents
Burnett County99%
Polk County1.5%

Town or county subdivisionShare of ZIP residents
Grantsburg village28%
Grantsburg town25%
Wood River town19%
Trade Lake town9.1%
Anderson town8.7%
West Marshland town8.5%
Sterling town1.2%
Laketown town0.3%
Daniels town0.1%
Lincoln town<0.1%
Union townland only

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 25)Romaine Quinn (R)100%
Assembly Member (Assembly District 75)Duke Tucker (R)100%

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 25100%

State house districtShare of ZIP residents
Assembly District 75100%

Voting precincts

16 voting precincts overlap ZIP 54840. 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:

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ZIP 54840 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.