Andover Center Historic District is a 270-acre (110 ha) historic district in the town of Andover, Connecticut. It was listed on the National Register of Historic Places in 2003 for its architecture. The district then included 60 contributing buildings, 2 contributing sites, 4 contributing structures and one other contributing object, among which are a city hall, a cemetery, and a fire station. Colonial and Federal architecture are represented. It includes five Colonial houses from the 18th century, including the Phelps-Bingham House, the oldest, which has a Greek Revival elements.