East Lyme [New London County] was named in 1816 and incorporated from Lyme and Waterford in 1839. ndon County.--(Form of government, selectmen, town meeting, board of finance.)--Inc., May, 1839; taken from Lyme and Waterford. Area, 42.0 sq. miles. Population, est., 15,824. Voting districts, 3. Principal industries, boat marinas, sport fishing, tourism.East Lyme includes the area known as Niantic.