Berlin (/ˈbɜːrlɪn/ BUR-lin) is a town in Hartford County, Connecticut, United States. The population was 20,175 at the 2020 census. It was incorporated in 1785. The geographic center of Connecticut is located in the town. Berlin is residential and industrial, and is served by the Amtrak station of the same name. Berlin also has two hamlets: Kensington and East Berlin.