Callao, Missouri
Callao is a city in Macon County, Missouri, with 251 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 6.
County
| County | Share of residents |
|---|---|
| Macon County | 100% |
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 6) | Ed Lewis (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
- Callao laws: search for the Callao, Missouri code of ordinances
- Macon County website: http://www.maconcountymo.com
- Macon County laws: search for the Macon 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 6 | 100% |
ZIP codes
Percentages mark ZIPs only partly in Callao: the share of that ZIP's residents living in it.
- 63534 (34%)
Get this in your AI agent
Your agent can get Callao'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:2910486")
Callao 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.