ZIP code 16403 is in Cambridge Springs (39% of residents) and Rockdale Acres (1.2%), in Crawford County (95%) and Erie County (5.0%), Pennsylvania. 60% of its residents live outside city limits. It is in Pennsylvania's 16th congressional district. Its state senate districts are State Senate District 50 (95%) and State Senate District 49 (5.0%); its state house districts are State House District 65 (95%) and State House District 4 (5.0%).
Members serving now (119th Congress, until January 3, 2027). Source: Members of Congress: the @unitedstates project, congress-legislators (CC0).
State legislative districts
State senate district
Share of ZIP residents
State Senate District 50
95%
State Senate District 49
5.0%
State house district
Share of ZIP residents
State House District 65
95%
State House District 4
5.0%
Voting precincts
10 voting precincts overlap ZIP 16403.
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:16403")
ZIP 16403 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.