Memorial Green is a 2-acre square open space in Old Saybrook Center. The green is bounded by Town Hall and the Old Fire House to the north, Main Street School to the east, the firehouse to the south, and Main Street to the west. Two concrete paths lead from Main Street to a small plaza where Korean War and World War monuments are grouped. A third concrete sidewalk extends from Main Street toward the northern boundary of the green to the school entrance. Toward the eastern boundary, separated from the memorials by a row of ornamental trees, is a gazebo that was donated by the Old Saybrook Rotary Club in 1975. Ornamental plantings have been placed throughout the green, giving it the appearance of a park.

Other notable features include a small wooden tourist information center at the southeast corner of the green and benches placed along Main Street and around the memorials.

Surrounding the green is a mix of commercial and municipal buildings. The Town Hall, to the north, was built in 1906 for the Saybrook Music and Drama Club. In 1909 the building was deeded to the town for use as a town hall. The Old Fire House, behind Town Hall, now functions as an annex for Town Hall. The building was a gift of Mr. Sheffield as a firehouse for the town's first chemical fire truck. Main Street School, behind the green, is a Colonial Revival style brick building, built in 1936 with 1948 additions. The present firehouse, south of the green, is a nondescript brick structure. Across the street from the green is a modern police headquarters built in 1974 and a nondescript commercial building, now serving as a food mart, which was built in 1959.