ZIP code 63020: De Soto, MO
ZIP code 63020 is in De Soto (32% of residents), Summer Set (5.5%), Olympian Village (3.5%) and Briarwood Estates (1.7%), in Jefferson County (100%), Washington County (0.1%) and St. Francois County (<0.1%), Missouri. 58% of its residents live outside city limits. It is in Missouri's 3rd congressional district (60%) and Missouri's 8th congressional district (40%). Its state senate district is State Senate District 3; its state house districts are State House District 115 (99%), State House District 111 (0.6%), State House District 118 (0.1%) and State House District 117 (<0.1%).
See it on the mapAll of Missouri
City and county
| City or town | Share of ZIP residents |
|---|---|
| De Soto | 32% |
| Summer Set | 5.5% |
| Olympian Village | 3.5% |
| Briarwood Estates | 1.7% |
| Hillsboro | <0.1% |
| County | Share of ZIP residents |
|---|---|
| Jefferson County | 100% |
| Washington County | 0.1% |
| St. Francois County | <0.1% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Valle township | 75% |
| Plattin township | 13% |
| Central township | 7.5% |
| Big River township | 3.9% |
| Kingston township | 0.1% |
| Marion township | <0.1% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Missouri's 3rd congressional district (MO-03) | 60% |
| Missouri's 8th congressional district (MO-08) | 40% |
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 | 60% |
| U.S. Representative (MO-08) | Jason Smith (R) | 202-225-4404 | 40% |
| 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 115) | Bill Lucas (R) | 99% | |
| State Representative (State House District 111) | Cecelie Williams (R) | 0.6% | |
| State Representative (State House District 118) | Mike McGirl (R) | 0.1% | |
| State Representative (State House District 117) | Becky Laubinger (R) | <0.1% |
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
- De Soto website: http://www.desotomo.com/
- De Soto laws: search for the De Soto, Missouri code of ordinances
- Summer Set laws: search for the Summer Set, Missouri code of ordinances
- Olympian Village laws: search for the Olympian Village, Missouri code of ordinances
- Jefferson County website: http://www.jeffcomo.org
- Jefferson County laws: search for the Jefferson County, Missouri code of ordinances
- Washington County website: http://www.washingtoncountymo.us/
- Washington County laws: search for the Washington 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 115 | 99% |
| State House District 111 | 0.6% |
| State House District 118 | 0.1% |
| State House District 117 | <0.1% |
Voting precincts
13 voting precincts overlap ZIP 63020. 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:63020")
ZIP 63020 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.