ZIP code 19720 is in Wilmington Manor (13% of residents), New Castle (9.1%), Bear (3.2%) and St. Georges (2.4%), in New Castle County, Delaware. 72% of its residents live outside city limits. It is in Delaware's at-large congressional district. Its state senate districts are State Senate District 2 (40%), State Senate District 13 (39%), State Senate District 12 (20%) and State Senate District 3 (1.9%); its state house districts are State Representative District 17 (37%), State Representative District 16 (34%), State Representative District 5 (22%), State Representative District 18 (3.6%) and State Representative District 15 (3.0%).
36 voting precincts overlap ZIP 19720.
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:19720")
ZIP 19720 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.