ZIP code 63630: Union, MO
ZIP code 63630 is in Washington County (99%) and St. Francois County (0.9%), Missouri, outside any city or Census-designated place. It is in Missouri's 3rd congressional district (99%) and Missouri's 8th congressional district (0.9%). Its state senate district is State Senate District 3; its state house districts are State House District 118 (97%), State House District 144 (1.8%) and State House District 117 (0.9%).
See it on the mapAll of Missouri
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Washington County | 99% |
| St. Francois County | 0.9% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Union township | 70% |
| Kingston township | 15% |
| Breton township | 8.4% |
| Liberty township | 5.8% |
| Big River township | 0.9% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Missouri's 3rd congressional district (MO-03) | 99% |
| Missouri's 8th congressional district (MO-08) | 0.9% |
This ZIP is split between districts. A mailing address in it could be in either; the map or locate_point gives the district for an exact address.
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (MO-03) | Robert F. Onder, Jr. (R) | 202-225-2956 | 99% |
| U.S. Representative (MO-08) | Jason Smith (R) | 202-225-4404 | 0.9% |
| 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 3) | Mike Henderson (R) | 100% | |
| State Representative (State House District 118) | Mike McGirl (R) | 97% | |
| State Representative (State House District 144) | Tony Harbison (R) | 1.8% | |
| State Representative (State House District 117) | Becky Laubinger (R) | 0.9% |
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
- Washington County website: http://www.washingtoncountymo.us/
- Washington County laws: search for the Washington County, Missouri code of ordinances
- St. Francois County website: http://www.sfcgov.org
- St. Francois County laws: search for the St. Francois County, Missouri code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 3 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 118 | 97% |
| State House District 144 | 1.8% |
| State House District 117 | 0.9% |
Voting precincts
6 voting precincts overlap ZIP 63630. 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:63630")
ZIP 63630 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.