Liberty Green is a small (quarter-acre) rectangular greensward located at a busy intersection in the Niantic section of East Lyme. State Route 161 defines the eastern boundary of the green, State Route 156 the southern boundary, the Coastal Savings Bank the western boundary, and Niantic Village (commercial development) the northern boundary. Long Island Sound, across State Route 156, is visible from the green.

An asphalt sidewalk bisects the green diagonally from north to south. Five-foot-high stone pillars stand on either side of the sidewalk, at each end. Each pillar is embellished with a concrete cap and a granite plaque with the engraving, "Niantic 1839-1929." On the west side of the sidewalk, at the northern end, is a magnificent European beech tree and in front of the tree is a flagpole, approximately 60 feet tall, from which flies an American flag and a POW-MIA flag. Although local historians are in agreement that the flagpole came from an old schooner, it is not known from which ship it came, or why. Between the beech tree and the flagpole is a wooden bench, set within brick paving. To the east side of the walk, at the southern end, are the Old Lyme war memorials. Here at the corner of the green are memorials to veterans of World War I, World War II, and the Korean and Vietnam Wars. The Honor Roll (World War I) consists of a granite slab engraved with the names of those who served. The Veterans Memorial (World War I and the Korean and Vietnam Wars) is composed of three cut stone walls that join at the corners.

In addition to the beech tree, plantings on the green include perennial beds, yew shrubs, juniper shrubs, maple trees, and a crabapple tree. Neighboring buildings are predominantly 20th-century commercial structures, with the exception of the Morton House, a 19th-century three-story structure with a mansard roof and a tower.