East Haven is a town in New Haven County, Connecticut, in the United States. As of the 2020 census, the town population was 27,923. The town is located 3 miles (5 km) east of New Haven, and is part of the South Central Connecticut Planning Region. East Haven is 35 miles (56 km) from Hartford, 82 miles (132 km) from New York City, 99 miles (159 km) from Providence, Rhode Island, and 140 miles (230 km) from Boston.

New Haven County is a county in the south central part of the U.S. state of Connecticut. As of the 2020 census, the population was 864,835, making it the third-most populous county in Connecticut. Two of the state's top 5 largest cities, New Haven (3rd) and Waterbury (5th), are part of New Haven County.