ZIP code 19803: New Castle County, DE
ZIP code 19803 is in New Castle County, Delaware, outside any city or Census-designated place. It is in Delaware's at-large congressional district. Its state senate districts are State Senate District 1 (40%), State Senate District 5 (31%) and State Senate District 4 (29%); its state house districts are State Representative District 6 (56%), State Representative District 12 (41%) and State Representative District 10 (2.9%).
See it on the mapAll of Delaware
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| New Castle County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Brandywine CCD | 100% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Delaware's at-large congressional district (DE-AL) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (DE-AL) | Sarah McBride (D) | 202-225-4165 | 100% |
| U.S. Senator | Christopher A. Coons (D) | 202-224-5042 · contact form | statewide |
| U.S. Senator | Lisa Blunt Rochester (D) | 202-224-2441 | statewide |
| State Senator (State Senate District 1) | Dan Cruce (Democratic) | 40% | |
| State Senator (State Senate District 5) | Ray Seigfried (Democratic) | 31% | |
| State Senator (State Senate District 4) | Laura Sturgeon (Democratic) | 29% | |
| State Representative (State Representative District 6) | Debra Heffernan (Democratic) | 56% | |
| State Representative (State Representative District 12) | Krista Griffith (Democratic) | 41% | |
| State Representative (State Representative District 10) | Melanie Ross Levin (Democratic) | 2.9% |
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).
Local government
- New Castle County website: https://www.newcastlede.gov
- New Castle County laws: search for the New Castle County, Delaware code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 1 | 40% |
| State Senate District 5 | 31% |
| State Senate District 4 | 29% |
| State house district | Share of ZIP residents |
|---|---|
| State Representative District 6 | 56% |
| State Representative District 12 | 41% |
| State Representative District 10 | 2.9% |
Voting precincts
15 voting precincts overlap ZIP 19803. 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:19803")
ZIP 19803 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.