ZIP code 54406: Amherst, WI

ZIP code 54406 is in Amherst (31% of residents), in Portage County, Wisconsin. 69% of its residents live outside city limits. It is in Wisconsin's 3rd congressional district. Its state senate districts are State Senate District 24 (73%) and State Senate District 19 (27%); its state house districts are Assembly District 71 (73%) and Assembly District 57 (27%).

3,647residents (2020 Census)

66.4 sq miland area

1cities and towns

1congressional district

9voting precincts

See it on the map All of Wisconsin

City and county

City or town	Share of ZIP residents
Amherst	31%

County	Share of ZIP residents
Portage County	100%

Town or county subdivision	Share of ZIP residents
Amherst village	31%
Lanark town	27%
Amherst town	25%
Stockton town	9.5%
Buena Vista town	8.8%

Congressional district

Congressional district	Share of ZIP residents
Wisconsin's 3rd congressional district (WI-03)	100%

Elected officials

Office	Member	Contact	Share of residents
U.S. Representative (WI-03)	Derrick Van Orden (R)	202-225-5506	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 24)	Patrick Testin (R)		73%
State Senator (State Senate District 19)	Rachael Cabral-Guevara (R)		27%
Assembly Member (Assembly District 71)	Vinnie Miresse (Democratic)		73%
Assembly Member (Assembly District 57)	Kevin Petersen (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

Amherst laws: search for the Amherst, Wisconsin code of ordinances
Portage County website: http://www.co.portage.wi.us
Portage County laws: search for the Portage County, Wisconsin code of ordinances

State legislative districts

State senate district	Share of ZIP residents
State Senate District 24	73%
State Senate District 19	27%

State house district	Share of ZIP residents
Assembly District 71	73%
Assembly District 57	27%

Voting precincts

9 voting precincts overlap ZIP 54406. 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:54406")

ZIP 54406 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.