Boundary Atlas

ZIP code 54656: Sparta, WI

ZIP code 54656 is in Sparta (54% of residents) and Cataract (1.2%), in Monroe County (100%) and La Crosse County (0.1%), Wisconsin. 44% of its residents live outside city limits. It is in Wisconsin's 3rd congressional district. Its state senate districts are State Senate District 32 (88%) and State Senate District 24 (12%); its state house districts are Assembly District 95 (88%) and Assembly District 70 (12%).

18,411residents (2020 Census)
282.3 sq miland area
2cities and towns
1congressional district
31voting precincts

See it on the mapAll of Wisconsin

City and county

City or townShare of ZIP residents
Sparta54%
Cataract1.2%

CountyShare of ZIP residents
Monroe County100%
La Crosse County0.1%

Town or county subdivisionShare of ZIP residents
Sparta city54%
Sparta town17%
Angelo town9.2%
Little Falls town8.1%
Leon town5.3%
Lafayette town2.4%
Wells town2.0%
New Lyme town0.7%
Adrian town0.4%
Burns town0.1%
Greenfield town<0.1%
Grant townland only

Congressional district

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

State legislative districts

State senate districtShare of ZIP residents
State Senate District 3288%
State Senate District 2412%

State house districtShare of ZIP residents
Assembly District 9588%
Assembly District 7012%

Voting precincts

31 voting precincts overlap ZIP 54656. 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:54656")

ZIP 54656 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.