Columbia, Missouri
Columbia is a city in Boone County, Missouri, with 126,346 residents in 2020. It spans 2 congressional districts: MO-03 (61%) and MO-04 (39%). It spans 5 state house districts. Its state senate district is State Senate District 19.
County
| County | Share of residents |
|---|---|
| Boone County | 100% |
Congressional districts
| Congressional district | Share of residents |
|---|---|
| Missouri's 3rd congressional district (MO-03) | 61% |
| Missouri's 4th congressional district (MO-04) | 39% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| Mayor | Barbara Buffaloe | citywide | |
| U.S. Representative (MO-03) | Robert F. Onder, Jr. (R) | 202-225-2956 | 61% |
| U.S. Representative (MO-04) | Mark Alford (R) | 202-225-2876 | 39% |
| 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 19) | Stephen Webber (Democratic) | 100% | |
| State Representative (State House District 45) | Kathy Steinhoff (Democratic) | 29% | |
| State Representative (State House District 46) | David Smith (Democratic) | 29% | |
| State Representative (State House District 50) | Gregg Bush (Democratic) | 26% | |
| State Representative (State House District 47) | Adrian Plank (Democratic) | 16% | |
| State Representative (State House District 44) | John Martin (R) | <0.1% |
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
- Columbia website: https://www.como.gov/
- Columbia laws: search for the Columbia, Missouri code of ordinances
- Boone County website: https://www.boonemo.gov/
- Boone County laws: search for the Boone County, Missouri code of ordinances
State legislative districts
| State senate district | Share of residents |
|---|---|
| State Senate District 19 | 100% |
| State house district | Share of residents |
|---|---|
| State House District 45 | 29% |
| State House District 46 | 29% |
| State House District 50 | 26% |
| State House District 47 | 16% |
| State House District 44 | <0.1% |
ZIP codes
Percentages mark ZIPs only partly in Columbia: the share of that ZIP's residents living in it.
Get this in your AI agent
Your agent can get Columbia'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:2915670")
Columbia 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.