Upper Main Street Historic District (Ansonia, Connecticut)

Ansonia station is a commuter rail station on the Waterbury Branch of the Metro-North Railroad's New Haven Line, located in Ansonia, Connecticut.

The U.S. Post Office-Ansonia Main, also known as the Ansonia Main Post Office, is located at 237 Main Street in Ansonia, Connecticut. Designed by Oscar Wenderoth and completed in 1914, it is one of the more architecturally sophisticated buildings in Ansonia's central business district. The building was listed on the National Register of Historic Places in 1985.

The Ansonia Library is the public library serving Ansonia, Connecticut. It is located at 53 South Cliff, in an architecturally distinguished Richardsonian Romanesque building designed by Connecticut architect George Keller and completed in 1892 as a gift from Caroline Phelps Stokes. It was listed on the National Register of Historic Places on August 23, 1985.

St. Joseph Parish is a church designated for Polish immigrants in Ansonia, Connecticut, United States. Founded in 1925, it is one of the Polish-American Roman Catholic parishes in New England in the Archdiocese of Hartford.

The Richard Mansfield House is a historic house at 35 Jewett Street in Ansonia, Connecticut. Built at the turn of the 17th-century, it is one of the community's oldest surviving buildings, and is noted for its association with a prominent early Episcopal minister. It was listed on the National Register of Historic Places in 1971.

Ansonia is a city in New Haven County, Connecticut, United States. Located on the Naugatuck River, it is immediately north of Derby, and about 12 miles (19 km) northwest of New Haven. The population was 18,918 at the time of the 2020 census. The ZIP code for Ansonia is 06401. The city is served by the Metro-North Railroad. Ansonia Station is a stop on the railroad passenger commuter service's Waterbury Branch connecting to New York's Grand Central Terminal. Ansonia also is served by the Connecticut Transit bus carrier. Connecticut Route 8 serves Ansonia (Northbound, Exit 18; Southbound, Exit 19). Ansonia, also referred to as "The Copper City", is recognized for its history of heavy machine manufacturing industry in the lower Naugatuck Valley. Production included copper, brass, rubber and plastics processing, molding and tubing, iron castings, sheet metal, electric, automatic screw machine, textiles, and foundry products. The well-known Ansonia Clock Company was founded here in 1851. Ansonia is the birthplace of David Humphreys, a diplomat and colonel in the American Revolutionary War.

Griffin Hospital is a 160-bed community hospital founded in 1909 and located in Derby, Connecticut. The hospital serves more than 130,000 residents in the Lower Naugatuck Valley. Griffin Hospital is Derby's top employer and one of New Haven County's largest employers. Griffin Hospital serves as a flagship hospital for Planetree, an international healthcare organization that centers on patient care. It is a clinical campus of the New York Institute of Technology College of Osteopathic Medicine and provides clinical clerkship education for the medical school's osteopathic medical students.

The General David Humphreys House is a historic house museum at 37 Elm Street in Ansonia, Connecticut. Built in the 1690s, it was the birthplace of the American Revolutionary War Colonel David Humphreys. It is now owned by the Derby Historical Society, and serves as its headquarters. The house was listed on the National Register of Historic Places in 1972.

Derby is a city in New Haven County, Connecticut, United States, approximately 8 miles west-northwest of New Haven. It is located in southwest Connecticut at the confluence of the Housatonic and Naugatuck Rivers. It borders the cities of Ansonia to the north and Shelton to the southwest, and the towns of Orange to the south, Seymour to the northwest, and Woodbridge to the east. The population was 12,325 at the 2020 census. It is the smallest city in Connecticut by area, at 5.3 square miles.Derby was settled in 1642 as an Indian trading post under the name Paugasset. It was named after Derby, England, in 1675. It included what are now Ansonia, Seymour, Oxford, and parts of Beacon Falls. Derby is home to the first electric trolley system in New England, only the second in the United States. It is also home to the first electric locomotive in U.S. history to be built and successfully used commercially for hauling freight. The locomotive, built in 1888, is still kept in running condition by the Shore Line Trolley Museum.

Harcourt Wood Memorial Library (also known as the Derby Public Library) is a historic public library at 313 Elizabeth Street in Derby, Connecticut. Built in 1902, it is a fine local example of Colonial Revival architecture, funded by the local streetcar railway owner. It was added to the National Register of Historic Places in 1982.

Derby High School is a public secondary education school for grades 9–12, it is located at 75 Chatfield Street in Derby. It is the only public secondary education school in Derby and is one of five public schools in the city. The current school building was built in 1967, and up until 2010 housed Derby Middle and High Schools together. In 2010, Derby Middle School was completed across the street from the high school.

Ansonia High School is a public four-year high school located in Ansonia, Connecticut. It has approximately 513 students in grades 9 through 12. About 31.6 percent of the student body is Caucasian; 68.4 percent is minority. The school is accredited by the New England Association of Colleges and Secondary Schools, and the Connecticut State Department of Education.