Zip Code 06401 — Ansonia, CT

ZIP Code 06401 is associated with Ansonia, CT, in Naugatuck Valley County. The listed population estimate is 19,315; estimated density is 1,237.6 people per square mile. Among records with population estimates, it ranks #9 of 26 in Naugatuck Valley County and #70 of 285 in CT.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (41.344240, -73.068960)

Data MetricLocal Statistic
Postal / Zip Code06401
Primary CityAnsonia
State / ProvinceCT
CountyNaugatuck Valley
Total Population19,315
Population Density1,237.6 people/sq mi
TimezoneAmerica/New_York

How 06401 Compares

MetricZIP 06401Naugatuck Valley County recordsCT records
Population estimate19,315455,072 (sum)3,624,508 (sum)
Population Density1,237.6 /sq mi----
County population rank#9 of 26----
State population rank#70 of 285----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in CT

ZIP CodeCityDistancePopulation estimate
ZIP 06418Derby1.4 mi12,205
ZIP 06483Seymour2.7 mi16,889
ZIP 06525Woodbridge3.2 mi9,073
ZIP 06484Shelton4.5 mi41,889
ZIP 06477Orange4.8 mi14,315

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →