Boundary Atlas

Puerto Rico: cities, counties, ZIP codes and districts

Puerto Rico has 1 congressional district, 8 state senate districts and 40 state house districts under the maps in force for November 3, 2026, plus 1,291 voting precincts, 78 counties, 292 cities, towns and Census-designated places, and 132 ZIP codes.

Cities and towns

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

Congressional districts (2026)

DistrictShort2020 population
Puerto Rico's at-large congressional districtPR-AL3,285,874

ZIP codes in Puerto Rico

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 Puerto Rico. 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="PR")