ZIP code 49031 is in Cassopolis (22% of residents), in Cass County, Michigan. 78% of its residents live outside city limits. It is in Michigan's 5th congressional district. Its state senate district is State Senate District 17; its state house districts are State House District 36 (98%) and State House District 37 (2.2%).
Members serving now (119th Congress, until January 3, 2027). Source: Members of Congress: the @unitedstates project, congress-legislators (CC0).
State legislative districts
State senate district
Share of ZIP residents
State Senate District 17
100%
State house district
Share of ZIP residents
State House District 36
98%
State House District 37
2.2%
Voting precincts
10 voting precincts overlap ZIP 49031.
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:49031")
ZIP 49031 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.