Berlin is a town in the Capitol Planning Region, 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.

Berlin station is a train station located in the Kensington neighborhood of Berlin, Connecticut. It is on the New Haven–Springfield Line and is served by Amtrak's Northeast Regional, Hartford Line, and Valley Flyer, in addition to the Hartford Line commuter rail. Two high-level platforms, each six cars long connected by an overhead pedestrian bridge opened at the Hartford Line service launch on June 16, 2018. On December 21, 2016, the historic 1900-built station building was destroyed by a fire.