Castletown was the capital of the Isle of Man until 1864, when the distinction was transferred to Douglas.
In the most recent census in 2006, Castletown had a population of 3,109.

Castletown was the capital of the Isle of Man until 1864, when the distinction was transferred to Douglas.
In the most recent census in 2006, Castletown had a population of 3,109.
