Boundary Atlas

ZIP code 53566: Monroe, WI

ZIP code 53566 is in Monroe (71% of residents), in Green County, Wisconsin. 29% of its residents live outside city limits. It is in Wisconsin's 2nd congressional district. Its state senate district is State Senate District 17; its state house district is Assembly District 50.

14,970residents (2020 Census)
152.9 sq miland area
1cities and towns
1congressional district
23voting precincts

See it on the mapAll of Wisconsin

City and county

City or townShare of ZIP residents
Monroe71%

CountyShare of ZIP residents
Green County100%

Town or county subdivisionShare of ZIP residents
Monroe city71%
Monroe town8.4%
Clarno town7.6%
Sylvester town5.7%
Jefferson town2.5%
Jordan town2.5%
Washington town1.0%
Cadiz town0.7%
Adams town0.2%
Mount Pleasant town<0.1%

Congressional district

Congressional districtShare of ZIP residents
Wisconsin's 2nd congressional district (WI-02)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (WI-02)Mark Pocan (D)202-225-2906100%
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 17)Howard Marklein (R)100%
Assembly Member (Assembly District 50)Jenna Jacobson (Democratic)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 17100%

State house districtShare of ZIP residents
Assembly District 50100%

Voting precincts

23 voting precincts overlap ZIP 53566. 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:53566")

ZIP 53566 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.