Downtown Ansonia
253 Main St, Ansonia, CT 06401
Ansonia is a small city on the Naugatuck River in the Naugatuck Valley, about 12 miles northwest of New Haven. It was founded in 1844 by merchant Anson Green Phelps as a company town for brass manufacturing, and a flood wall now runs along the river through downtown, built after the Flood of 1955 sent the Naugatuck over its banks.
Ansonia uses a single ZIP code, 06401, for the entire city.
| Area | Zip code | Where it is |
|---|---|---|
| Downtown Ansonia | 06401 | Main Street between the Naugatuck River and City Hall, the city's commercial core. |
Ansonia covers about 6.02 square miles and borders Derby, Seymour and Woodbridge. It was incorporated in 1889.
Start with Ansonia Nature & Recreation Center and Nolan Field.
A 156-acre park of wooded hills, streams and a two-acre pond laced with about 2.5 miles of nature trails. The visitor center has nature exhibits and resident animal ambassadors, and the park hosts a Creature Feature program most Saturdays and a guided hike most Sundays.
10 Deerfield Rd, Ansonia, CT
Plan a visitA city sports complex with baseball, softball and soccer fields, tennis courts, a playground and a walking trail. It hosts community events and youth sports tournaments through the year.
Ansonia, CT
Merchant Anson Green Phelps founded the settlement in 1844 to house workers for his brass and copper mills, and the city takes his name.
Ansonia native Pierre Lallement is credited with building an early bicycle here in 1866, one of the first in the United States.
The Flood of 1955, caused by Hurricane Diane, sent the Naugatuck River over its banks and devastated the Naugatuck Valley; a flood-control wall now runs along the river through the city.
Most of Ansonia's outdoor recreation centers on the Naugatuck River valley and the wooded hillsides above it.
3 places in Ansonia to try, including cafe / bakery and restaurant / cocktail bar. No one paid to be listed.
Cafe / bakery
A family-owned cafe on Main Street serving homemade baked goods, breakfast and lunch.
560 Main St, Ansonia, CT 06401
Restaurant / cocktail bar
A Main Street restaurant and cocktail bar.
350 Main St, Ansonia, CT 06401
Bar / restaurant
A Main Street bar and restaurant that opened in January 2025.
313 Main St, Ansonia, CT 06401
Downtown Main Street is walkable block to block, with City Hall, the library and storefronts within a few blocks of each other. Most residential neighborhoods on the hills above the river are built for driving, without continuous sidewalks.
253 Main St, Ansonia, CT 06401
Approximate, without traffic.
CTtransit and Valley Transit's Route 255 runs along Route 34 connecting Ansonia to the Derby-Shelton area, Seymour and New Haven. Ansonia station, at 40 West Main Street, is a stop on the Waterbury Branch of the Metro-North Railroad; rail service on the branch is scheduled to be replaced by buses from July 2026 to May 2027 for station reconstruction.
Ansonia's 2026–27 mill rate is 29.46, which is $29.46 of tax for every $1,000 of assessed value. Connecticut taxes a home at 70% of its appraised value, so every $100,000 of value costs about $2,062 a year in taxes at 29.46 mills.
| 12 months ending | Single-family | Condo |
|---|---|---|
| Sep 2024 | $369,00090 sales | – |
| Sep 2025 | $385,00093 sales | $210,0005 sales |
October to September, state records. Text us for this month's sales.
29.46mills, fiscal year 2026–27
| Fiscal year | Town rate |
|---|---|
| 2022–23 | 37.80 |
| 2023–24 | 26.24 |
| 2024–25 | 26.49 |
| 2025–26 | 28.55 |
| 2026–27 | 29.46 |
Ansonia's town rate went from 37.80 in 2022–23 to 29.46 in 2026–27. Next revaluation: October 1, 2026.
What we check on a Ansonia purchase: CHFA limits, the flood map and river flood zones.
CHFA sets Ansonia's income and price limits for New Haven County. We check them with you before you shop.
See CHFA's limits mapThe Naugatuck River runs through the middle of the city; a flood-control wall along the east bank was built after the 1955 flood, and low-lying areas near the river remain in FEMA flood zones. We check FEMA's map before you offer.
FEMA's flood map for AnsoniaParts of Ansonia along the Naugatuck River are in mapped flood zones despite the flood-control wall built after 1955. We check the flood map before you make an offer on anything near the river.
All loans are subject to credit approval, underwriting, and property and program requirements. CHFA and USDA limits and eligibility are set by those agencies and change from time to time.
Send us a Ansonia address and we'll run the numbers, taxes included.
Who to call in Ansonia: Eversource for power.
North Division Street, Ansonia, CT 06401 Monday through Saturday
Transfer station detailsAnsonia Town Hall is at 253 Main St, Ansonia, CT 06401. Hours: Mon-Wed 8:30-4:30, Thu 8:30-5:00, Fri 8:30-1:00. Main line: (203) 736-5900. Each link opens that office's page on the town's website.
The short answers. Call or text us for the long ones.
Ansonia's 2026–27 mill rate is 29.46, which is $29.46 of tax for every $1,000 of assessed value. The motor vehicle rate is 29.46 mills.
Connecticut assesses homes at 70% of appraised value, so a $500,000 home would be assessed at about $350,000. At 29.46 mills that's about $10,311 a year, or about $859 a month. The actual bill depends on the town assessor's appraisal, not the price you pay.
In the 12 months from October 2024 through September 2025, the median single-family sale in Ansonia was $385,000 across 93 sales, compared with $369,000 the year before. The median condo sale was $210,000 across 5 sales.
Ansonia's next revaluation takes effect October 1, 2026, on the state's schedule. The new assessments first show up on the tax bills due in July 2027.
New Haven County, in the Naugatuck Valley.
06401, for the entire city.
Yes, Ansonia station at 40 West Main Street is on the Waterbury Branch of Metro-North, though rail service is being replaced by buses from July 2026 to May 2027 during station construction.
The city offers curbside collection, and residents can also use the transfer station on North Division Street with proof of residency.
Monday-Wednesday 8:30 a.m.-4:30 p.m., Thursday 8:30 a.m.-5:00 p.m., Friday 8:30 a.m.-1:00 p.m.
Neighbors of Ansonia in New Haven County and nearby. All New Haven County towns.