The CDP occupies the central part of the town of New London, extending northwest to County Road and southeast past Squires Lane but not as far as Ridgeview Road/Quail Run.

To the north the CDP extends beyond Seamans Road but not as far as Birch Acres Road, while to the south the CDP reaches to Lion Brook, south of Balsam Acres.

Interstate 89 passes 2 miles (3 km) southwest of the CDP, with access from Exits 11 and 12.

According to the U.S. Census Bureau, the New London CDP has a total area of 1.1 square miles (2.9 km2), of which 1.2 acres (4,986 m2), or 0.17%, are water.

846 residents (60.6% of the CDP population) lived in group quarters such as dormitories or nursing facilities.