Boundary Atlas

Missouri: cities, counties, ZIP codes and districts

Missouri has 8 congressional districts, 34 state senate districts and 163 state house districts under the maps in force for November 3, 2026, plus 4,284 voting precincts, 115 counties, 1,081 cities, towns and Census-designated places, and 1,035 ZIP codes.

Cities and towns

Largest first. Each page lists the city's county, districts and ZIP codes.

Congressional districts (2026)

DistrictShort2020 population
Missouri's 1st congressional districtMO-01769,364
Missouri's 2nd congressional districtMO-02769,364
Missouri's 3rd congressional districtMO-03769,364
Missouri's 4th congressional districtMO-04769,364
Missouri's 5th congressional districtMO-05769,364
Missouri's 6th congressional districtMO-06769,364
Missouri's 7th congressional districtMO-07769,365
Missouri's 8th congressional districtMO-08769,364

ZIP codes in Missouri

Each page lists the ZIP's congressional and legislative districts, with population shares where it's split.

Get this in your AI agent

Your agent can list, look up and map every district and precinct in Missouri. Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

list_geographies(country="US", level="congressional_district", region="MO")