The South Glastonbury Historic District is a historic district in Glastonbury, Connecticut. It encompasses the historic village center of South Glastonbury, which was first settled in the 17th century. High Street is the oldest street in the district; it is part of the original east-west route from the Connecticut River ferry connecting Glastonbury and [Rocky Hill, Connecticut|Rocky Hill]]. The village center is a triangle made up of all or part of Main, High, and Water Streets, and includes 83 contributing resources, including the public library, located in a former Methodist Church built in 1828, a c. 1740 house at 120 High Street, and the c. 1878 Carpenter Gothic St. Augustine's Church.