ZIP code 65109: Jefferson City, MO
ZIP code 65109 is in Jefferson City (59% of residents) and St. Martins (2.8%), in Cole County, Missouri. 38% of its residents live outside city limits. It is in Missouri's 3rd congressional district. Its state senate district is State Senate District 6; its state house districts are State House District 59 (52%) and State House District 60 (48%).
See it on the mapAll of Missouri
City and county
| City or town | Share of ZIP residents |
|---|---|
| Jefferson City | 59% |
| St. Martins | 2.8% |
| County | Share of ZIP residents |
|---|---|
| Cole County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Jefferson township | 92% |
| Marion township | 5.7% |
| Clark township | 2.1% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Missouri's 3rd congressional district (MO-03) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| Mayor | Ron Fitzwater | 59% | |
| U.S. Representative (MO-03) | Robert F. Onder, Jr. (R) | 202-225-2956 | 100% |
| U.S. Senator | Eric Schmitt (R) | 202-224-5721 · contact form | statewide |
| U.S. Senator | Josh Hawley (R) | 202-224-6154 · contact form | statewide |
| State Senator (State Senate District 6) | Mike Bernskoetter (R) | 100% | |
| State Representative (State House District 59) | Rudy Veit (R) | 52% | |
| State Representative (State House District 60) | Dave Griffith (R) | 48% |
From Wikidata (community-maintained); confirm on the city's website.
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
- Jefferson City website: https://www.jeffersoncitymo.gov/
- Jefferson City laws: search for the Jefferson City, Missouri code of ordinances
- St. Martins laws: search for the St. Martins, Missouri code of ordinances
- Cole County website: http://www.colecounty.org
- Cole County laws: search for the Cole County, Missouri code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 6 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 59 | 52% |
| State House District 60 | 48% |
Voting precincts
14 voting precincts overlap ZIP 65109. 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:65109")
ZIP 65109 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.