ZIP code 48854: Mason, MI
ZIP code 48854 is in Mason (42% of residents) and Holt (2.9%), in Ingham County, Michigan. 55% of its residents live outside city limits. It is in Michigan's 7th congressional district. Its state senate districts are State Senate District 21 (99%) and State Senate District 28 (1.3%); its state house districts are State House District 73 (93%) and State House District 74 (6.6%).
See it on the mapAll of Michigan
City and county
| City or town | Share of ZIP residents |
|---|---|
| Mason | 42% |
| Holt | 2.9% |
| County | Share of ZIP residents |
|---|---|
| Ingham County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Mason city | 42% |
| Aurelius township | 17% |
| Vevay township | 17% |
| Alaiedon township | 13% |
| Delhi charter township | 6.6% |
| Ingham township | 2.0% |
| Wheatfield township | 1.3% |
| Onondaga township | 0.8% |
| Leslie township | 0.4% |
| Lansing city | land only |
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 21) | Sarah Anthony (Democratic) | 99% | |
| State Senator (State Senate District 28) | Sam Singh (Democratic) | 1.3% | |
| State Representative (State House District 73) | Julie Brixie (Democratic) | 93% | |
| State Representative (State House District 74) | Kara Hope (Democratic) | 6.6% |
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
- Mason website: http://www.mason.mi.us
- Mason laws: search for the Mason, Michigan code of ordinances
- Holt laws: search for the Holt, Michigan code of ordinances
- Ingham County website: http://www.ingham.org
- Ingham County laws: search for the Ingham County, Michigan code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 21 | 99% |
| State Senate District 28 | 1.3% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 73 | 93% |
| State House District 74 | 6.6% |
Voting precincts
14 voting precincts overlap ZIP 48854. 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:48854")
ZIP 48854 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.