ZIP code 49303: Casnovia, MI
ZIP code 49303 is in Muskegon County (92%) and Newaygo County (7.9%), Michigan, outside any city or Census-designated place. It is in Michigan's 2nd congressional district. Its state senate district is State Senate District 33; its state house districts are State House District 89 (92%) and State House District 101 (7.9%).
See it on the mapAll of Michigan
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Muskegon County | 92% |
| Newaygo County | 7.9% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Casnovia township | 89% |
| Ashland township | 7.9% |
| Moorland township | 2.7% |
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 33) | Rick Outman (R) | 100% | |
| State Representative (State House District 89) | Luke Meerman (R) | 92% | |
| State Representative (State House District 101) | Joseph Fox (R) | 7.9% |
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
- Muskegon County website: http://www.co.muskegon.mi.us
- Muskegon County laws: search for the Muskegon County, Michigan code of ordinances
- Newaygo County website: https://www.newaygocountymi.gov/
- Newaygo County laws: search for the Newaygo County, Michigan code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 33 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 89 | 92% |
| State House District 101 | 7.9% |
Voting precincts
3 voting precincts overlap ZIP 49303. 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:49303")
ZIP 49303 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.