Boundary Atlas

ZIP code 63131: Des Peres, MO

ZIP code 63131 is in Des Peres (43% of residents), Town and Country (28%), Frontenac (20%), Crystal Lake Park (2.8%), Huntleigh (2.0%) and Westwood (1.7%), in St. Louis County, Missouri. It is in Missouri's 2nd congressional district (95%) and Missouri's 1st congressional district (4.8%). Its state senate districts are State Senate District 24 (69%) and State Senate District 15 (31%); its state house district is State House District 89.

18,241residents (2020 Census)
13.6 sq miland area
7cities and towns
2congressional districts
36voting precincts

See it on the mapAll of Missouri

City and county

City or townShare of ZIP residents
Des Peres43%
Town and Country28%
Frontenac20%
Crystal Lake Park2.8%
Huntleigh2.0%
Westwood1.7%
Country Life Acres0.4%

CountyShare of ZIP residents
St. Louis County100%

Town or county subdivisionShare of ZIP residents
Missouri River township98%
Clayton township2.0%

Congressional districts

Congressional districtShare of ZIP residents
Missouri's 2nd congressional district (MO-02)95%
Missouri's 1st congressional district (MO-01)4.8%

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

OfficeMemberContactShare of residents
U.S. Representative (MO-02)Ann Wagner (R)202-225-162195%
U.S. Representative (MO-01)Wesley Bell (D)202-225-24064.8%
U.S. SenatorEric Schmitt (R)202-224-5721 · contact formstatewide
U.S. SenatorJosh Hawley (R)202-224-6154 · contact formstatewide
State Senator (State Senate District 24)Tracy McCreery (Democratic)69%
State Senator (State Senate District 15)David Gregory (R)31%
State Representative (State House District 89)George Hruza (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

State legislative districts

State senate districtShare of ZIP residents
State Senate District 2469%
State Senate District 1531%

State house districtShare of ZIP residents
State House District 89100%

Voting precincts

36 voting precincts overlap ZIP 63131. Map them, with each precinct's share of the ZIP's residents.

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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:63131")

ZIP 63131 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.