ZIP code 48309: Rochester Hills, MI
ZIP code 48309 is in Rochester Hills (92% of residents) and Auburn Hills (7.5%), in Oakland County, Michigan. It is in Michigan's 10th congressional district (92%) and Michigan's 11th congressional district (7.5%). Its state senate districts are State Senate District 9 (92%) and State Senate District 7 (7.5%); its state house districts are State House District 55 (92%) and State House District 54 (7.5%).
See it on the mapAll of Michigan
City and county
| City or town | Share of ZIP residents |
|---|---|
| Rochester Hills | 92% |
| Auburn Hills | 7.5% |
| County | Share of ZIP residents |
|---|---|
| Oakland County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Rochester Hills city | 92% |
| Auburn Hills city | 7.5% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Michigan's 10th congressional district (MI-10) | 92% |
| Michigan's 11th congressional district (MI-11) | 7.5% |
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.
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (MI-10) | John James (R) | 202-225-4961 | 92% |
| U.S. Representative (MI-11) | Haley M. Stevens (D) | 202-225-8171 | 7.5% |
| 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 9) | Michael Webber (R) | 92% | |
| State Senator (State Senate District 7) | Jeremy Moss (Democratic) | 7.5% | |
| State Representative (State House District 55) | Mark Tisdel (R) | 92% | |
| State Representative (State House District 54) | Donni Steele (R) | 7.5% |
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
- Rochester Hills website: https://www.rochesterhills.org/
- Rochester Hills laws: search for the Rochester Hills, Michigan code of ordinances
- Auburn Hills website: https://www.auburnhills.org/
- Auburn Hills laws: search for the Auburn Hills, 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 9 | 92% |
| State Senate District 7 | 7.5% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 55 | 92% |
| State House District 54 | 7.5% |
Voting precincts
11 voting precincts overlap ZIP 48309. 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:48309")
ZIP 48309 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.