ZIP code 63121 is in Northwoods (16% of residents), Normandy (15%), Pine Lawn (8.0%), Bel-Ridge (7.6%), Bel-Nor (6.1%), Hillsdale (5.3%), Velda City (5.2%), Cool Valley (4.5%), Pasadena Hills (4.0%), Norwood Court (3.9%), Velda Village Hills (3.9%), Greendale (2.7%), Beverly Hills (2.1%), Pasadena Park (1.9%), Uplands Park (1.4%) and Ferguson (1.0%), in St. Louis County, Missouri. 11% of its residents live outside city limits. It is in Missouri's 1st congressional district. Its state senate district is State Senate District 14; its state house districts are State House District 74 (74%), State House District 85 (24%) and State House District 73 (2.0%).
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).
45 voting precincts overlap ZIP 63121.
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:63121")
ZIP 63121 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.