ZIP code 54521: Lincoln, WI

ZIP code 54521 is in Eagle River (20% of residents), in Vilas County (84%), Oneida County (16%) and Forest County (0.5%), Wisconsin. 80% of its residents live outside city limits. It is in Wisconsin's 7th congressional district. Its state senate district is State Senate District 12; its state house districts are Assembly District 34 (100%) and Assembly District 36 (0.5%).

8,317residents (2020 Census)

188.4 sq miland area

1cities and towns

1congressional district

24voting precincts

See it on the map All of Wisconsin

City and county

City or town	Share of ZIP residents
Eagle River	20%

County	Share of ZIP residents
Vilas County	84%
Oneida County	16%
Forest County	0.5%

Town or county subdivision	Share of ZIP residents
Lincoln town	32%
Eagle River city	20%
Washington town	19%
Cloverland town	11%
Sugar Camp town	9.2%
Three Lakes town	5.0%
Newbold town	1.3%
Conover town	1.0%
Phelps town	0.7%
Hiles town	0.5%
Plum Lake town	0.4%

Congressional district

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

Elected officials

Office	Member	Contact	Share of residents
U.S. Representative (WI-07)	Thomas P. Tiffany (R)	202-225-3365	100%
U.S. Senator	Ron Johnson (R)	202-224-5323 · contact form	statewide
U.S. Senator	Tammy Baldwin (D)	202-224-5653 · contact form	statewide
State Senator (State Senate District 12)	Mary Felzkowski (R)		100%
Assembly Member (Assembly District 34)	Rob Swearingen (R)		100%
Assembly Member (Assembly District 36)	Jeff Mursau (R)		0.5%

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

Eagle River website: http://eagleriver.govoffice2.com/
Eagle River laws: search for the Eagle River, Wisconsin code of ordinances
Vilas County laws: search for the Vilas County, Wisconsin code of ordinances
Oneida County laws: search for the Oneida County, Wisconsin code of ordinances

State legislative districts

State senate district	Share of ZIP residents
State Senate District 12	100%

State house district	Share of ZIP residents
Assembly District 34	100%
Assembly District 36	0.5%

Voting precincts

24 voting precincts overlap ZIP 54521. 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:54521")

ZIP 54521 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.