The Connecticut Audubon Society at Glastonbury is one of four educational centers established by the Connecticut Audubon Society, which was founded in 1898. The independent organization is committed to conservation through science-based education and advocacy focused on the state's bird populations and their habitats.
The Glastonbury center has the use of the adjoining town-owned 48-acre wooded Earle Park, which has a pond and a creek and extends to the Connecticut River. The facility offers programs for children and adults.
Glastonbury Chamber of Commerce promotes the business community and works to enhance the quality of life in Glastonbury. The chamber has over 550 members which include local businesses large and small. Every year in October the chamber sponsors the Apple Harvest Festival, the largest event in the area. The Riverfront Musical Festival is co-sponsored by the chamber.
The Historical Society of Glastonbury was established in 1936 to preserve the town's historical heritage and to display it in an educational and entertaining manner. Its museum, located in the former town hall at 1944 Main Street, houses exhibits ranging from Native American artifacts to early 20th century items. The society maintains an extensive schedule of house tours and walking tours, and hosts the annual Farm Festival and Antiques Festival.