Boundary Atlas

ZIP code 53027: Hartford, WI

ZIP code 53027 is in Hartford (67% of residents), in Washington County (98%) and Dodge County (2.5%), Wisconsin. 33% of its residents live outside city limits. It is in Wisconsin's 5th congressional district. Its state senate districts are State Senate District 33 (93%), State Senate District 20 (5.6%) and State Senate District 13 (1.8%); its state house districts are Assembly District 98 (92%), Assembly District 59 (4.9%), Assembly District 38 (1.8%), Assembly District 58 (0.8%) and Assembly District 99 (0.7%).

23,254residents (2020 Census)
91.0 sq miland area
2cities and towns
1congressional district
30voting precincts

See it on the mapAll of Wisconsin

City and county

City or townShare of ZIP residents
Hartford67%
Richfield0.5%

CountyShare of ZIP residents
Washington County98%
Dodge County2.5%

Town or county subdivisionShare of ZIP residents
Hartford city67%
Erin town15%
Hartford town9.4%
Addison town4.9%
Herman town1.8%
Richfield village0.5%
Ashippun town0.4%
Polk town0.4%
West Bend town0.3%
Rubicon town0.2%

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 33)Chris Kapenga (R)93%
State Senator (State Senate District 20)Dan Feyen (R)920-952-70015.6%
State Senator (State Senate District 13)John Jagler (R)1.8%
Assembly Member (Assembly District 98)Jim Piwowarczyk (R)92%
Assembly Member (Assembly District 59)Rob Brooks (R)4.9%
Assembly Member (Assembly District 38)Will Penterman (R)1.8%
Assembly Member (Assembly District 58)Rick Gundrum (R)0.8%
Assembly Member (Assembly District 99)Barbara Dittrich (R)0.7%

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 3393%
State Senate District 205.6%
State Senate District 131.8%

State house districtShare of ZIP residents
Assembly District 9892%
Assembly District 594.9%
Assembly District 381.8%
Assembly District 580.8%
Assembly District 990.7%

Voting precincts

30 voting precincts overlap ZIP 53027. Map them, with each precinct's share of the ZIP's residents.

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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:53027")

ZIP 53027 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.