ZIP code 54234: Sister Bay, WI

ZIP code 54234 is in Sister Bay (55% of residents), in Door County, Wisconsin. 45% of its residents live outside city limits. It is in Wisconsin's 8th congressional district. Its state senate district is State Senate District 1; its state house district is Assembly District 1.

2,072residents (2020 Census)

23.4 sq miland area

2cities and towns

1congressional district

5voting precincts

See it on the map All of Wisconsin

City and county

City or town	Share of ZIP residents
Sister Bay	55%
Ephraim	0.6%

County	Share of ZIP residents
Door County	100%

Town or county subdivision	Share of ZIP residents
Sister Bay village	55%
Liberty Grove town	44%
Ephraim village	0.6%

Congressional district

Congressional district	Share of ZIP residents
Wisconsin's 8th congressional district (WI-08)	100%

Elected officials

Office	Member	Contact	Share of residents
U.S. Representative (WI-08)	Tony Wied (R)	202-225-5665	100%
U.S. Senator	Ron Johnson (R)	202-224-5323 · contact form	statewide
U.S. Senator	Tammy Baldwin (D)	202-224-5653 · contact form	statewide
State Senator (State Senate District 1)	André Jacque (R)		100%
Assembly Member (Assembly District 1)	Joel Kitchens (R)		100%

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

Sister Bay website: https://sisterbaywi.gov
Sister Bay laws: search for the Sister Bay, Wisconsin code of ordinances
Door County website: https://www.co.door.wi.gov/
Door County laws: search for the Door County, Wisconsin code of ordinances

State legislative districts

State senate district	Share of ZIP residents
State Senate District 1	100%

State house district	Share of ZIP residents
Assembly District 1	100%

Voting precincts

5 voting precincts overlap ZIP 54234. 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:

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ZIP 54234 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.