Boundary Atlas

ZIP code 63005: Chesterfield, MO

ZIP code 63005 is in Chesterfield (52% of residents), Wildwood (36%) and Clarkson Valley (12%), in St. Louis County (100%) and Franklin County (0.2%), Missouri. It is in Missouri's 2nd congressional district. Its state senate districts are State Senate District 15 (100%) and State Senate District 26 (0.2%); its state house districts are State House District 101 (52%), State House District 110 (48%) and State House District 109 (0.2%).

19,235residents (2020 Census)
36.5 sq miland area
3cities and towns
1congressional district
19voting precincts

See it on the mapAll of Missouri

City and county

City or townShare of ZIP residents
Chesterfield52%
Wildwood36%
Clarkson Valley12%

CountyShare of ZIP residents
St. Louis County100%
Franklin County0.2%

Town or county subdivisionShare of ZIP residents
Chesterfield township100%
Boles township0.2%

Congressional district

Congressional districtShare of ZIP residents
Missouri's 2nd congressional district (MO-02)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 15100%
State Senate District 260.2%

State house districtShare of ZIP residents
State House District 10152%
State House District 11048%
State House District 1090.2%

Voting precincts

19 voting precincts overlap ZIP 63005. 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:63005")

ZIP 63005 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.