Boundary Atlas

ZIP code 63010: Arnold, MO

ZIP code 63010 is in Arnold (60% of residents), in Jefferson County, Missouri. 40% of its residents live outside city limits. It is in Missouri's 8th congressional district. Its state senate district is State Senate District 22; its state house districts are State House District 113 (73%), State House District 112 (26%) and State House District 97 (0.8%).

35,027residents (2020 Census)
21.6 sq miland area
2cities and towns
1congressional district
12voting precincts

See it on the mapAll of Missouri

City and county

City or townShare of ZIP residents
Arnold60%
Imperial0.6%

CountyShare of ZIP residents
Jefferson County100%

Town or county subdivisionShare of ZIP residents
Arnold township60%
Windsor township38%
Rock township2.1%
Imperial township0.5%

Congressional district

Congressional districtShare of ZIP residents
Missouri's 8th congressional district (MO-08)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 22100%

State house districtShare of ZIP residents
State House District 11373%
State House District 11226%
State House District 970.8%

Voting precincts

12 voting precincts overlap ZIP 63010. 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:63010")

ZIP 63010 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.