Kotka is a city and municipality of Finland.
Kotka is located on the coast of the Gulf of Finland at the mouth of Kymi River and it is part of the Kymenlaakso region in southern Finland. The city has a population of 54,342 (31 March 2016) and covers an area of 272.01 square kilometres (105.02 sq mi) of which 678.45 km2 (261.95 sq mi) is water. The population density is 200.31 inhabitants per square kilometre (518.8/sq mi). The city centre of Kotka is located at Kotkansaari island.
The municipality is officially unilingually Finnish. Historically however, Swedish was the only official language in the city until 1902. From 1902 until 1906, the city was officially bilingual. Kotka also had a Swedish speaking minority (see: Swedish-speaking population of Finland), which in the 1890s accounted for 16% of the city population. Their proportion has steadily decreased and today around 1% of the city's population are Swedish speakers. There is one school in Kotka where Swedish is the language of instruction, Kotka Svenska Samskola, which was founded in 1885.