ZIP code 00603 is in Aguadilla (22% of residents), Cabán (5.5%) and Rafael Hernández (2.3%), in Aguadilla Municipio (100%) and Moca Municipio (0.2%), Puerto Rico. 70% of its residents live outside city limits. It is in Puerto Rico's at-large congressional district. Its state senate district is State Senate District 4; its state house districts are State House District 17 (93%) and State House District 16 (6.9%).
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).
16 voting precincts overlap ZIP 00603.
Map them, with each precinct's share of the ZIP's residents.
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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:00603")
ZIP 00603 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.