ZIP code 48820: DeWitt, MI
ZIP code 48820 is in DeWitt (27% of residents), in Clinton County, Michigan. 73% of its residents live outside city limits. It is in Michigan's 7th congressional district. Its state senate district is State Senate District 28; its state house districts are State House District 77 (91%) and State House District 75 (8.7%).
See it on the mapAll of Michigan
City and county
| City or town | Share of ZIP residents |
|---|---|
| DeWitt | 27% |
| Wacousta | 0.8% |
| County | Share of ZIP residents |
|---|---|
| Clinton County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| DeWitt charter township | 47% |
| DeWitt city | 27% |
| Watertown charter township | 11% |
| Olive township | 8.3% |
| Riley township | 6.3% |
| Victor township | 0.4% |
| Westphalia township | 0.2% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Michigan's 7th congressional district (MI-07) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (MI-07) | Tom Barrett (R) | 202-225-4872 | 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 28) | Sam Singh (Democratic) | 100% | |
| State Representative (State House District 77) | Emily Dievendorf (Democratic) | 91% | |
| State Representative (State House District 75) | Penelope Tsernoglou (Democratic) | 8.7% |
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
- DeWitt website: https://dewittmi.gov
- DeWitt laws: search for the DeWitt, Michigan code of ordinances
- Clinton County website: http://www.clinton-county.org
- Clinton County laws: search for the Clinton County, Michigan code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 28 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 77 | 91% |
| State House District 75 | 8.7% |
Voting precincts
13 voting precincts overlap ZIP 48820. 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:48820")
ZIP 48820 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.