ZIP code 13620 is in Castorland (16% of residents), in Lewis County, New York. 84% of its residents live outside city limits. It is in New York's 21st congressional district. Its state senate district is State Senate District 49; its state house district is Assembly District 117.
4 voting precincts overlap ZIP 13620.
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:13620")
ZIP 13620 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.