Rumia (Kashubian/Pomeranian: Rëmiô, ) is a city in the Eastern Pomerania region of north-western Poland, with some 45,000 inhabitants. It is a part of the Kashubian Tricity (Rumia, Reda, Wejherowo) and a suburb part of the metropolitan area of the Tricity. It has been situated in the Wejherowo County in Pomeranian Voivodeship since 1999; previously it was in Gdansk Voivodeship (1975–1998). Traditionally, Rumia is related to Kashubia. It is connected by well-developed railway and highway connections to the Tricity, an urban agglomeration of over 1 million inhabitants on the coast of Gdansk Bay.