ZIP code 48637: Merrill, MI
ZIP code 48637 is in Merrill (21% of residents), in Saginaw County (79%), Midland County (14%) and Gratiot County (6.7%), Michigan. 79% of its residents live outside city limits. It is in Michigan's 8th congressional district (93%) and Michigan's 2nd congressional district (6.7%). Its state senate districts are State Senate District 34 (86%), State Senate District 35 (12%) and State Senate District 26 (1.7%); its state house districts are State House District 93 (86%) and State House District 95 (14%).
See it on the mapAll of Michigan
City and county
| City or town | Share of ZIP residents |
|---|---|
| Merrill | 21% |
| County | Share of ZIP residents |
|---|---|
| Saginaw County | 79% |
| Midland County | 14% |
| Gratiot County | 6.7% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Jonesfield township | 51% |
| Lakefield township | 22% |
| Mount Haley township | 12% |
| Fremont township | 4.9% |
| Wheeler township | 4.0% |
| Lafayette township | 2.7% |
| Porter township | 1.7% |
| Richland township | 1.7% |
| Ingersoll township | 0.2% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Michigan's 8th congressional district (MI-08) | 93% |
| Michigan's 2nd congressional district (MI-02) | 6.7% |
This ZIP is split between districts. A mailing address in it could be in either; the map or locate_point gives the district for an exact address.
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 34 | 86% |
| State Senate District 35 | 12% |
| State Senate District 26 | 1.7% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 93 | 86% |
| State House District 95 | 14% |
Voting precincts
9 voting precincts overlap ZIP 48637. 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:48637")
ZIP 48637 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.