Boundary Atlas

Oregon: cities, counties, ZIP codes and districts

Oregon has 6 congressional districts, 30 state senate districts and 60 state house districts under the maps in force for November 3, 2026, plus 1,060 voting precincts, 36 counties, 426 cities, towns and Census-designated places, and 427 ZIP codes.

Cities and towns

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

Congressional districts (2026)

DistrictShort2020 population
Oregon's 1st congressional districtOR-01706,209
Oregon's 2nd congressional districtOR-02706,209
Oregon's 3rd congressional districtOR-03706,209
Oregon's 4th congressional districtOR-04706,208
Oregon's 5th congressional districtOR-05706,209
Oregon's 6th congressional districtOR-06706,212

ZIP codes in Oregon

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 Oregon. 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="OR")