Derby, Connecticut
Derby is a city in Naugatuck Valley Planning Region, Connecticut, with 12,325 residents in 2020. It is in Connecticut's 3rd congressional district. It spans 3 state house districts. Its state senate district is State Senate District 17.
County
| County | Share of residents |
|---|---|
| Naugatuck Valley Planning Region | 100% |
Congressional district
| Congressional district | Share of residents |
|---|---|
| Connecticut's 3rd congressional district (CT-03) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (CT-03) | Rosa L. DeLauro (D) | 202-225-3661 | 100% |
| U.S. Senator | Christopher Murphy (D) | 202-224-4041 · contact form | statewide |
| U.S. Senator | Richard Blumenthal (D) | 202-224-2823 · contact form | statewide |
| State Senator (State Senate District 17) | Jorge Cabrera (Democratic) | 100% | |
| State Representative (State House District 114) | Mary Welander (Democratic/Working Families) | 54% | |
| State Representative (State House District 104) | Kara Rochelle (Democratic) | 42% | |
| State Representative (State House District 105) | Nicole Klarides-Ditria (R) | 4.6% |
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
- Derby website: http://www.derbyct.gov/
- Derby laws: search for the Derby, Connecticut code of ordinances
- Naugatuck Valley Planning Region laws: search for the Naugatuck Valley Planning Region, Connecticut code of ordinances
State legislative districts
| State senate district | Share of residents |
|---|---|
| State Senate District 17 | 100% |
| State house district | Share of residents |
|---|---|
| State House District 114 | 54% |
| State House District 104 | 42% |
| State House District 105 | 4.6% |
ZIP codes
Percentages mark ZIPs only partly in Derby: the share of that ZIP's residents living in it.
Get this in your AI agent
Your agent can get Derby'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:0919480")
Derby 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.