Kaustinen is a municipality of Finland. It is part of the Central Ostrobothnia region. The municipality has a population about 4300 and covers an area of 361.12 square kilometres (139.43 sq mi) of which 7.09 km2 (2.74 sq mi) is water. The population density is 11.69 inhabitants per square kilometre (30.3/sq mi).

Kokkola is a town in Finland and the regional capital of Central Ostrobothnia. It is located on the west coast of the country, on the Gulf of Bothnia. The population of Kokkola is approximately 48,000, while the sub-region has a population of approximately 54,000. It is the 22nd most populous municipality in Finland, and the 20th most populous urban area in the country.