New Castle, Delaware
New Castle is a city in New Castle County, Delaware, with 5,551 residents in 2020. It is in Delaware's at-large congressional district. It spans 2 state senate and 2 state house districts.
County
| County | Share of residents |
|---|---|
| New Castle County | 100% |
Congressional district
| Congressional district | Share of 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 12) | Nicole Poore (Democratic) | 70% | |
| State Senator (State Senate District 2) | Darius Brown (Democratic) | 30% | |
| State Representative (State Representative District 16) | Frank Cooke (Democratic) | 84% | |
| State Representative (State Representative District 17) | Melissa Minor-Brown (Democratic) | 16% |
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 website: http://newcastlecity.delaware.gov
- New Castle laws: search for the New Castle, Delaware code of ordinances
- 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 residents |
|---|---|
| State Senate District 12 | 70% |
| State Senate District 2 | 30% |
| State house district | Share of residents |
|---|---|
| State Representative District 16 | 84% |
| State Representative District 17 | 16% |
ZIP codes
Percentages mark ZIPs only partly in New Castle: the share of that ZIP's residents living in it.
- 19720 (9.1%)
Get this in your AI agent
Your agent can get New Castle's counties and districts with shares, its ZIP codes (level='zcta'), and its boundary as GeoJSON (get_boundaries). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:place:1050800")
New Castle here is the Census Bureau's place boundary as of January 1, 2025. Shares are of 2020 Census population. Districts are the maps in force for the November 3, 2026 election.