Hannibal, Missouri
Hannibal is a city in Marion County (98% of residents) and Ralls County (1.7%), Missouri, with 17,108 residents in 2020. It is in Missouri's 6th congressional district. Its state senate district is State Senate District 18; its state house district is State House District 5.
County
| County | Share of residents |
|---|---|
| Marion County | 98% |
| Ralls County | 1.7% |
Congressional district
| Congressional district | Share of residents |
|---|---|
| Missouri's 6th congressional district (MO-06) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (MO-06) | Sam Graves (R) | 202-225-7041 | 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 18) | Cindy O'Laughlin (R) | 100% | |
| State Representative (State House District 5) | Louis Riggs (R) | 100% |
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
- Hannibal website: http://www.hannibal-mo.gov/
- Hannibal laws: search for the Hannibal, Missouri code of ordinances
- Marion County website: https://marioncountymo.com/
- Marion County laws: search for the Marion County, Missouri code of ordinances
- Ralls County website: http://www.rallscounty.org
- Ralls County laws: search for the Ralls County, Missouri code of ordinances
State legislative districts
| State senate district | Share of residents |
|---|---|
| State Senate District 18 | 100% |
| State house district | Share of residents |
|---|---|
| State House District 5 | 100% |
ZIP codes
Percentages mark ZIPs only partly in Hannibal: the share of that ZIP's residents living in it.
- 63401 (78%)
Get this in your AI agent
Your agent can get Hannibal's counties and districts with shares, its ZIP codes (level='zcta'), and its boundary as GeoJSON (get_boundaries). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:place:2930214")
Hannibal here is the Census Bureau's place boundary as of January 1, 2025. Shares are of 2020 Census population. Districts are the maps in force for the November 3, 2026 election.