Municipalities of Kymenlaakso

Kotka (; ) is a town in Finland, located on the southeastern coast of the country at the mouth of the Kymi River. The population of Kotka is approximately , while the sub-region has a population of approximately . It is the most populous municipality in Finland, and the 16th most populous urban area in the country.

Kouvola () is a city in Finland and the administrative capital of Kymenlaakso. It is located in the southeastern interior of the country. The population of Kouvola is approximately . It is the most populous municipality in Finland, and the 17th most populous urban area in the country.

Hamina (; , , Sweden ) is a town and a municipality of Finland. It is located approximately east of the country's capital Helsinki, in the Kymenlaakso region, and formerly the province of Southern Finland. The municipality's population is (as of ) and covers an area of , of which is water. The population density is . The population of the central town is approximately 10,000. The municipal language of Hamina is Finnish.

Miehikkälä () is a municipality of Finland. It is located in the province of Southern Finland and is part of the Kymenlaakso region. The municipality has a population of (), which make it the smallest municipality in Kymenlaakso in terms of population. It covers an area of of which is water. The population density is .

Pyhtää () is a municipality of Finland. It is located in the Kymenlaakso region, west of the city of Kotka.

Virolahti (; ) is the southeasternmost municipality of Finland on the border of Russia. It is located in the Kymenlaakso region. The municipality has a population of () and covers an area of , of which is water. The population density is .