Boundary Atlas

ZIP code 53511: Beloit, WI

ZIP code 53511 is in Beloit (75% of residents), in Rock County, Wisconsin. 25% of its residents live outside city limits. It is in Wisconsin's 1st congressional district (83%) and Wisconsin's 2nd congressional district (17%). Its state senate district is State Senate District 15; its state house districts are Assembly District 45 (98%) and Assembly District 44 (1.7%).

48,659residents (2020 Census)
114.9 sq miland area
2cities and towns
2congressional districts
50voting precincts

See it on the mapAll of Wisconsin

City and county

City or townShare of ZIP residents
Beloit75%
Shopiere<0.1%

CountyShare of ZIP residents
Rock County100%

Town or county subdivisionShare of ZIP residents
Beloit city75%
Beloit town16%
Turtle town3.9%
Newark town3.1%
Rock town1.0%
Plymouth town0.7%
Avon town<0.1%
La Prairie town<0.1%

Congressional districts

Congressional districtShare of ZIP residents
Wisconsin's 1st congressional district (WI-01)83%
Wisconsin's 2nd congressional district (WI-02)17%

This ZIP is split between districts. A mailing address in it could be in either; the map or locate_point gives the district for an exact address.

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (WI-01)Bryan Steil (R)202-225-303183%
U.S. Representative (WI-02)Mark Pocan (D)202-225-290617%
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 15)Mark Spreitzer (Democratic)100%
Assembly Member (Assembly District 45)Clint Anderson (Democratic)98%
Assembly Member (Assembly District 44)Ann Roe (Democratic)1.7%

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 15100%

State house districtShare of ZIP residents
Assembly District 4598%
Assembly District 441.7%

Voting precincts

50 voting precincts overlap ZIP 53511. 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:53511")

ZIP 53511 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.