ZIP code 63017 is in Chesterfield (89% of residents), Town and Country (8.6%) and Ballwin (1.1%), in St. Louis County, Missouri. It is in Missouri's 2nd congressional district. Its state senate districts are State Senate District 15 (100%) and State Senate District 24 (<0.1%); its state house districts are State House District 101 (64%), State House District 89 (21%), State House District 87 (13%), State House District 100 (1.1%) and State House District 110 (0.8%).
46 voting precincts overlap ZIP 63017.
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:63017")
ZIP 63017 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.