According to the
United States Census Bureau, the city has a total area of , of which is land and , or 2.72%, is water. The city is bisected by the
Naugatuck River and spreads out from the river's banks up the hills—some quite steep—of the
river valley. On the west side of the river, the city abuts
Derby and
Seymour along Silver Hill. On the east side, the city's Hilltop neighborhood meets
Woodbridge. The land along the river is mostly given over to factory sites (both operational and defunct), with an area of wooded land on the west bank close to the city's northern boundary that belongs to the
American Brass Company. In the early 1990s, this site was proposed by Texas company American Ref-Fuel for a solid waste-to-electric energy
cogeneration plant. The proposal was controversial, and protests by residents resulted in its defeat. Residential housing occupies most of the land in Ansonia, chiefly one- or two-family houses on plots of a 1/4 acre up to an acre. Larger houses on larger plots are found in the Hilltop neighborhood. The Ansonia Nature Center on Hilltop preserves some open fields and woodlands. An airport once operated on Hilltop on a grass field, at the eastern edge of the city. During the
Cold War, the United States military deployed
Nike missiles in silos at the airport. Since the military released the airport grounds for other uses, developers have built residential housing there. The Nike base is now adapted as a horse farm with riding stables; few reminders of its former operations remain.
Neighborhoods Downtown – The original industrial village and later borough of Ansonia. Includes the area stretching between the factories at the north side of down town to the newer shopping plazas on the south side of downtown (Marshalls, Home Goods, Target, etc.)
Library District – The neighborhood surrounding the
Ansonia Library. Just east of downtown on top of the cliff. Includes the residential neighborhood between State Street and Beaver Street including South Cliff Street, North Cliff Street, Mott Street and Cottage Avenue. Contains mostly single-family historic Queen Anne Victorian homes. While now predominantly middle class, this area was settled early in Ansonia's history and was once home to many of the wealthy industrial families of Ansonia.
North End – The area comprising the North Main Street corridor stretching from Downtown to the Seymour Town line.
Reservoir – The area comprises the area of the Beaver, North Prospect, and Prospect Street corridors. It is along the Quillinan Reservoir.
Derby Hill – The area surrounding the Elm Street and Jewett Street area on the east side. Elm Street is also the town's historic district and was part of the original 1654 settlement of Derby. The name of this section of the town is sometimes disputed.
Hilltop – The area of the city that comprises the area of Prindle Avenue, Pulaski Highway and Ford Street corridors. This section was mainly farm land in the early days of the town. After World War II, it was developed as the largest residential area of the city.
West Ansonia – The residential village that comprised the west side of the Naugatuck River across from Ansonia (downtown). The original West Ansonia neighborhood consisted of High, Maple, and Jersey Streets (the latter somewhat redirected and now known as 'Olson Drive'), and later its name was synonymous with the entire present west side of the city.
Windy Hill – A section of West Ansonia centered around Murray, May, and Francis street. This area is considered to encompass the territory from the Derby Town line to Grove Street.
Silver Hill – The section of West Ansonia along the Silver Hill Road corridor. Parts of this section are shared with Derby.
Climate The climate in this area is characterized by warm to hot, humid summers and generally cool to cold winters. According to the
Köppen Climate Classification system, Ansonia has a
humid continental climate, abbreviated "Dfa" on climate maps. Alternatively, it can be classified as
humid subtropical ("Cfa") depending on which temperature isotherm for January is used. ==Demographics==