ZIP code 49405: Custer, MI
ZIP code 49405 is in Custer (17% of residents), in Mason County, Michigan. 83% of its residents live outside city limits. It is in Michigan's 2nd congressional district. Its state senate district is State Senate District 32; its state house districts are State House District 102 (90%) and State House District 101 (10.0%).
See it on the mapAll of Michigan
City and county
| City or town | Share of ZIP residents |
|---|---|
| Custer | 17% |
| County | Share of ZIP residents |
|---|---|
| Mason County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Custer township | 52% |
| Eden township | 28% |
| Sherman township | 11% |
| Branch township | 5.9% |
| Logan township | 2.7% |
| Sheridan township | 1.3% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Michigan's 2nd congressional district (MI-02) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (MI-02) | John R. Moolenaar (R) | 202-225-3561 | 100% |
| U.S. Senator | Elissa Slotkin (D) | 202-224-4822 | statewide |
| U.S. Senator | Gary C. Peters (D) | 202-224-6221 · contact form | statewide |
| State Senator (State Senate District 32) | Jon Bumstead (R) | 100% | |
| State Representative (State House District 102) | Curt VanderWall (R) | 90% | |
| State Representative (State House District 101) | Joseph Fox (R) | 10.0% |
Elected under MI's previous legislative map; the district's lines changed for 2026.
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
- Custer laws: search for the Custer, Michigan code of ordinances
- Mason County website: https://masoncounty.net
- Mason County laws: search for the Mason County, Michigan code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 32 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 102 | 90% |
| State House District 101 | 10.0% |
Voting precincts
6 voting precincts overlap ZIP 49405. 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:49405")
ZIP 49405 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.