ZIP code 48320: Keego Harbor, MI
ZIP code 48320 is in Keego Harbor (64% of residents) and Sylvan Lake (35%), in Oakland County, Michigan. It is in Michigan's 11th congressional district. Its state senate districts are State Senate District 13 (100%) and State Senate District 7 (0.5%); its state house district is State House District 20.
See it on the mapAll of Michigan
City and county
| City or town | Share of ZIP residents |
|---|---|
| Keego Harbor | 64% |
| Sylvan Lake | 35% |
| Orchard Lake Village | 0.2% |
| County | Share of ZIP residents |
|---|---|
| Oakland County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Keego Harbor city | 64% |
| Sylvan Lake city | 35% |
| Bloomfield charter township | 0.5% |
| Orchard Lake Village city | 0.2% |
| West Bloomfield charter township | 0.2% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Michigan's 11th congressional district (MI-11) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (MI-11) | Haley M. Stevens (D) | 202-225-8171 | 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 13) | Rosemary Bayer (Democratic) | 100% | |
| State Senator (State Senate District 7) | Jeremy Moss (Democratic) | 0.5% | |
| State Representative (State House District 20) | Noah Arbit (Democratic) | 100% |
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
- Keego Harbor website: https://www.keegoharbor.org
- Keego Harbor laws: search for the Keego Harbor, Michigan code of ordinances
- Sylvan Lake website: https://www.sylvanlake.org/
- Sylvan Lake laws: search for the Sylvan Lake, Michigan code of ordinances
- Oakland County website: http://www.oakgov.com
- Oakland County laws: search for the Oakland County, Michigan code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 13 | 100% |
| State Senate District 7 | 0.5% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 20 | 100% |
Voting precincts
5 voting precincts overlap ZIP 48320. 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:48320")
ZIP 48320 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.