Ansonia Connecticut ZIP Codes

Ansonia holds a single ZIP code.

Every ZIP code in Ansonia

The complete list of Ansonia, Connecticut ZIP codes with the planning region each falls in.
ZIP code	Planning region
06401	Naugatuck Valley Planning Region

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Ansonia codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Ansonia. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.

How these codes cluster

Every Ansonia ZIP code begins 064. Those first three digits identify the sectional center facility that processes mail for this part of Connecticut. Statewide that range covers 64 ZIP codes, so Ansonia accounts for 2% of it.

Every Connecticut ZIP prefix and the region it covers →

Area codes covering Ansonia

ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The codes below serve the same ground Ansonia occupies.

Ansonia Connecticut area codes in full →

Where Ansonia's ZIP codes sit

Each point is one Ansonia ZIP code, plotted from its record coordinates.

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

Cities near Ansonia

The closest places to Ansonia with their own ZIP code list, nearest first.
City	Distance	ZIP codes
Derby Connecticut ZIP codes	1.4 mi	1 ZIP code
Shelton Connecticut ZIP codes	4.5 mi	1 ZIP code
West Haven Connecticut ZIP codes	7.3 mi	1 ZIP code
New Haven Connecticut ZIP codes	7.9 mi	28 ZIP codes
Hamden Connecticut ZIP codes	8.0 mi	3 ZIP codes
Milford Connecticut ZIP codes	8.3 mi	2 ZIP codes
Trumbull Connecticut ZIP codes	9.5 mi	1 ZIP code
Naugatuck Connecticut ZIP codes	10 mi	1 ZIP code

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