Boundary Atlas

ZIP code 53137: Jefferson, WI

ZIP code 53137 is in Rome (19% of residents) and Helenville (14%), in Jefferson County, Wisconsin. 67% of its residents live outside city limits. It is in Wisconsin's 5th congressional district. Its state senate districts are State Senate District 13 (63%) and State Senate District 33 (37%); its state house districts are Assembly District 38 (63%) and Assembly District 97 (37%).

1,702residents (2020 Census)
33.2 sq miland area
2cities and towns
1congressional district
8voting precincts

See it on the mapAll of Wisconsin

City and county

City or townShare of ZIP residents
Rome19%
Helenville14%

CountyShare of ZIP residents
Jefferson County100%

Town or county subdivisionShare of ZIP residents
Jefferson town38%
Sullivan town35%
Farmington town25%
Concord town2.1%

Congressional district

Congressional districtShare of ZIP residents
Wisconsin's 5th congressional district (WI-05)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (WI-05)Scott Fitzgerald (R)202-225-5101100%
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 13)John Jagler (R)63%
State Senator (State Senate District 33)Chris Kapenga (R)37%
Assembly Member (Assembly District 38)Will Penterman (R)63%
Assembly Member (Assembly District 97)Cindi Duchow (R)37%

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 1363%
State Senate District 3337%

State house districtShare of ZIP residents
Assembly District 3863%
Assembly District 9737%

Voting precincts

8 voting precincts overlap ZIP 53137. 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:53137")

ZIP 53137 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.