The Free City of Danzig ( German : Freie Stadt Danzig ; Polish : Wolne Miasto Gdańsk ) was a semi-autonomous city-state that existed between 1920 and 1939 , consisting of the Baltic Sea port of Danzig ( today Gdańsk ) and nearly 200 towns in the surrounding areas .
The Free City of Danzig ( German : Freie Stadt Danzig ; Polish : Wolne Miasto Gdańsk ) was a self-governing port on the Baltic Sea port and a city-state .