ZIP code 83607 is in Caldwell (51% of residents), in Canyon County (97%), Payette County (1.8%) and Gem County (1.5%), Idaho. 49% of its residents live outside city limits. It is in Idaho's 1st congressional district. Its state senate districts are State Senate District 11 (46%), State Senate District 10 (17%), State Senate District 9 (15%), State Senate District 12 (10%), State Senate District 23 (10%) and State Senate District 14 (1.5%); its state house districts are State House District 11 (46%), State House District 10 (17%), State House District 9 (15%), State House District 12 (10%), State House District 23 (10%) and State House District 14 (1.5%).
18 voting precincts overlap ZIP 83607.
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:83607")
ZIP 83607 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.