ZIP code 06401: Ansonia, CT

ZIP code 06401 is in Ansonia, in Naugatuck Valley Planning Region, Connecticut. It is in Connecticut's 3rd congressional district. Its state senate district is State Senate District 17; its state house district is State House District 104.

18,946residents (2020 Census)

6.0 sq miland area

2cities and towns

1congressional district

8voting precincts

See it on the map All of Connecticut

City and county

City or town	Share of ZIP residents
Ansonia	100%
Derby	0.3%

County	Share of ZIP residents
Naugatuck Valley Planning Region	100%

Town or county subdivision	Share of ZIP residents
Ansonia town	100%
Derby town	0.3%

Congressional district

Congressional district	Share of ZIP 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 104)	Kara Rochelle (Democratic)		100%

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

Ansonia website: http://www.cityofansonia.com/
Ansonia laws: search for the Ansonia, 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 ZIP residents
State Senate District 17	100%

State house district	Share of ZIP residents
State House District 104	100%

Voting precincts

8 voting precincts overlap ZIP 06401. 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:06401")

ZIP 06401 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.