Boundary Atlas

ZIP code 53048: Lomira, WI

ZIP code 53048 is in Lomira (76% of residents), in Dodge County (99%) and Fond du Lac County (0.5%), Wisconsin. 24% of its residents live outside city limits. It is in Wisconsin's 6th congressional district (99%) and Wisconsin's 5th congressional district (0.7%). Its state senate districts are State Senate District 13 (99%) and State Senate District 20 (1.1%); its state house districts are Assembly District 37 (99%) and Assembly District 59 (1.1%).

3,542residents (2020 Census)
26.9 sq miland area
1cities and towns
2congressional districts
10voting precincts

See it on the mapAll of Wisconsin

City and county

City or townShare of ZIP residents
Lomira76%

CountyShare of ZIP residents
Dodge County99%
Fond du Lac County0.5%

Town or county subdivisionShare of ZIP residents
Lomira village76%
Lomira town15%
Leroy town8.3%
Theresa town0.6%
Ashford town0.5%

Congressional districts

Congressional districtShare of ZIP residents
Wisconsin's 6th congressional district (WI-06)99%
Wisconsin's 5th congressional district (WI-05)0.7%

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-06)Glenn Grothman (R)202-225-247699%
U.S. Representative (WI-05)Scott Fitzgerald (R)202-225-51010.7%
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)99%
State Senator (State Senate District 20)Dan Feyen (R)920-952-70011.1%
Assembly Member (Assembly District 37)Mark Born (R)99%
Assembly Member (Assembly District 59)Rob Brooks (R)1.1%

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 1399%
State Senate District 201.1%

State house districtShare of ZIP residents
Assembly District 3799%
Assembly District 591.1%

Voting precincts

10 voting precincts overlap ZIP 53048. 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:53048")

ZIP 53048 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.