O'Fallon, Missouri
O'Fallon is a city in St. Charles County, Missouri, with 91,372 residents in 2020. It spans 2 congressional districts: MO-02 (57%) and MO-03 (43%). It spans 6 state house districts. Its state senate district is State Senate District 2.
County
| County | Share of residents |
|---|---|
| St. Charles County | 100% |
Congressional districts
| Congressional district | Share of residents |
|---|---|
| Missouri's 2nd congressional district (MO-02) | 57% |
| Missouri's 3rd congressional district (MO-03) | 43% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (MO-02) | Ann Wagner (R) | 202-225-1621 | 57% |
| U.S. Representative (MO-03) | Robert F. Onder, Jr. (R) | 202-225-2956 | 43% |
| 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 2) | Nick Schroer (R) | 100% | |
| State Representative (State House District 103) | Dave Hinman (R) | 36% | |
| State Representative (State House District 107) | Mark Matthiesen (R) | 32% | |
| State Representative (State House District 64) | Deanna Self (R) | 19% | |
| State Representative (State House District 108) | Mike Costlow (R) | 12% | |
| State Representative (State House District 65) | Wendy Hausman (R) | 1.1% | |
| State Representative (State House District 102) | Richard West (R) | 0.7% |
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
- O'Fallon website: http://www.ofallon.mo.us/
- O'Fallon laws: search for the O'Fallon, Missouri code of ordinances
- St. Charles County website: http://www.sccmo.org
- St. Charles County laws: search for the St. Charles County, Missouri code of ordinances
State legislative districts
| State senate district | Share of residents |
|---|---|
| State Senate District 2 | 100% |
| State house district | Share of residents |
|---|---|
| State House District 103 | 36% |
| State House District 107 | 32% |
| State House District 64 | 19% |
| State House District 108 | 12% |
| State House District 65 | 1.1% |
| State House District 102 | 0.7% |
ZIP codes
Percentages mark ZIPs only partly in O'Fallon: the share of that ZIP's residents living in it.
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Your agent can get O'Fallon'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:
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O'Fallon 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.