Ellington [Tolland County] was originally called the "Great Swamp". It was named in 1735 from Ellington in Yorks or Hunts and incorporated from East Windsor in 1786.Area, 34.6 sq. miles. Population, 2000 Census, 12,921. Voting districts, 2. Principal industry, agriculture.Ellington is part of the Capitol Region Metropolitan District in Connecticut.