The Maritime County was a county centered around the Gdynia and Wejherowo, that existed from 1927 to 1939, and from 1945 to 1951. From 1927 to 1939, it was located in the Pomeranian Voivodeship, in the Second Polish Republic. In 1945, it was located in the , and from 1945 to 1951, it was located in the Gdańsk Voivodeship, which, in 1945 were under the administration of the Provisional Government of the Republic of Poland, from 1945 to 1947, under the administration of the Provisional Government of National Unity, and since 1947, under the administration of the Polish People's Republic. Until 1928, its seat was located in the city of Gdynia, and was since then moved to Wejherowo.