Ellington Center Historic District is an 80-acre (32 ha) historic district in the town of Ellington, Connecticut that was listed on the National Register of Historic Places in 1990. The historic district encompasses most of Ellington Center, including the town green and buildings that face the green or the streets that lead to it. It includes the Hall Memorial Library. Architecture represented includes the Colonial Revival style and work by . The Ellington green is largely open space with tall shade trees. A granite monument on the green identifies the site of the first meetinghouse in Ellington Center, built in 1739.