Raigad District
The district was called Colaba or Kulaba during British rule, a name that is derived from it ancient form, and which means the "Land of the Koli". The Koli are an adivasi, or tribal people.
Later the district was renamed to Alibaug, after the Muslim African principality of Murud-Janjira was merged into it after 1947; the town of Alibaug is the largest urban settlement and the capital of the district.