波兰走廊是德国在1919年根据凡尔赛条约割让予波兰的一块狭长领土，现在是波兰的领土。当时领土分配是基于三项考虑：

让波兰拥有海岸线也正是美国总统伍德罗·威尔逊的理论之一。他在1918年第一次世界大战结束前发表了著名的十四点和平原则，其中第十三点就是：

重要海港但泽（格但斯克）的居民大多是德国人，但国际联盟在没有准许公投之下，把该港变为受它保护的但泽自由市。为了减少对但泽的依赖，波兰在附近创建了新的海港格丁尼亚。

波兰走廊是狭长的领土，属于当时波兰的波美拉尼亚省。它把东普鲁士与德国其他领土分开。在北部地区，走廊的宽度仅仅有40公里长。由于德国领土被一分为二，东普鲁士的经济发展被严重阻碍。1922年，德国运输部为此成立航海服务（Seedienst Ostpreußen）连接两地，减少依赖陆路交通。

The Polish Corridor (German:Polnischer Korridor; Polish:Pomorze, Korytarz polski), also known as Danzig Corridor, Corridor to the Sea or Gdańsk Corridor, was a territory located in the region of Pomerelia (Pomeranian Voivodeship, eastern Pomerania, formerly part of West Prussia), which provided the Second Republic of Poland (1920–1939) with access to the Baltic Sea, thus dividing the bulk of Germany from the province of East Prussia. The Free City of Danzig (now the Polish city of Gdańsk) was separate from both Poland and Germany. A similar territory, also occasionally referred to as a corridor, had been connected to the Polish Crown as part of Royal Prussia during the period 1466–1772.