ZIP Code 06401

06401 is one of Connecticut's ZIP codes, delivering to addresses in Ansonia, Naugatuck Valley Planning Region.

City: Ansonia
Planning region: Naugatuck Valley Planning Region
State: Connecticut
Prefix: 064xx

Where this code sits

06401 is part of the 064xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Ansonia.

Ansonia Connecticut ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 06401 delivers to without sharing its boundary.

ZIP codes nearest 06401

The ZIP codes whose reference points sit closest to 06401.
ZIP code	Distance	Delivers to
ZIP code 06418	1.4 mi	Derby, CT
ZIP code 06483	3.0 mi	Seymour, CT
ZIP code 06484	3.9 mi	Shelton, CT
ZIP code 06477	4.8 mi	Orange, CT
ZIP code 06515	5.7 mi	New Haven, CT
ZIP code 06478	6.1 mi	Oxford, CT
ZIP code 06403	6.6 mi	Beacon Falls, CT
ZIP code 06491	6.6 mi	Stevenson, CT

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 06401, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 06401. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.