Boundary Atlas

ZIP code 53186: Waukesha, WI

ZIP code 53186 is in Waukesha (82% of residents), Pewaukee (7.5%) and Waukesha (2.4%), in Waukesha County, Wisconsin. 8.3% of its residents live outside city limits. It is in Wisconsin's 5th congressional district. Its state senate districts are State Senate District 28 (63%) and State Senate District 5 (37%); its state house districts are Assembly District 82 (37%), Assembly District 15 (37%) and Assembly District 83 (27%).

32,332residents (2020 Census)
12.6 sq miland area
3cities and towns
1congressional district
35voting precincts

See it on the mapAll of Wisconsin

City and county

City or townShare of ZIP residents
Waukesha82%
Pewaukee7.5%
Waukesha2.4%

CountyShare of ZIP residents
Waukesha County100%

Town or county subdivisionShare of ZIP residents
Waukesha city82%
Brookfield town8.3%
Pewaukee city7.5%
Waukesha village2.4%
Brookfield cityland only

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 28)Julian Bradley (R)63%
State Senator (State Senate District 5)Rob Hutton (R)37%
Assembly Member (Assembly District 82)Scott Allen (R)37%
Assembly Member (Assembly District 15)Adam Neylon (R)37%
Assembly Member (Assembly District 83)Dave Maxey (R)27%

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 2863%
State Senate District 537%

State house districtShare of ZIP residents
Assembly District 8237%
Assembly District 1537%
Assembly District 8327%

Voting precincts

35 voting precincts overlap ZIP 53186. 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:53186")

ZIP 53186 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.