ZIP code 48104: Ann Arbor, MI
ZIP code 48104 is in Ann Arbor (99% of residents), in Washtenaw County, Michigan. It is in Michigan's 6th congressional district. Its state senate districts are State Senate District 15 (98%) and State Senate District 14 (2.1%); its state house districts are State House District 23 (51%), State House District 33 (38%) and State House District 47 (10%).
See it on the mapAll of Michigan
City and county
| City or town | Share of ZIP residents |
|---|---|
| Ann Arbor | 99% |
| County | Share of ZIP residents |
|---|---|
| Washtenaw County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Ann Arbor city | 99% |
| Ann Arbor charter township | 0.7% |
| Pittsfield charter township | 0.1% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Michigan's 6th congressional district (MI-06) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| Mayor | Christopher Taylor | 99% | |
| U.S. Representative (MI-06) | Debbie Dingell (D) | 202-225-4071 | 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 15) | Jeff Irwin (Democratic) | 98% | |
| State Senator (State Senate District 14) | Sue Shink (Democratic) | 2.1% | |
| State Representative (State House District 23) | Jason Morgan (Democratic) | 51% | |
| State Representative (State House District 33) | Morgan Foreman (Democratic) | 38% | |
| State Representative (State House District 47) | Carrie Rheingans (Democratic) | 10% |
From Wikidata (community-maintained); confirm on the city's website.
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); Mayors: Wikidata (CC0).
Local government
- Ann Arbor website: https://www.a2gov.org/
- Ann Arbor council: Ann Arbor City Council
- Ann Arbor laws: search for the Ann Arbor, Michigan code of ordinances
- Washtenaw County website: https://washtenaw.org
- Washtenaw County laws: search for the Washtenaw County, Michigan code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 15 | 98% |
| State Senate District 14 | 2.1% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 23 | 51% |
| State House District 33 | 38% |
| State House District 47 | 10% |
Voting precincts
22 voting precincts overlap ZIP 48104. 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:48104")
ZIP 48104 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.