Raseborg is a town in Finland, located in the southern coast of the country. Raseborg is situated in the western part of the Uusimaa region. The …Raseborg is a town in Finland, located in the southern coast of the country. Raseborg is situated in the western part of the Uusimaa region. The population of Raseborg is approximately 27,000, while the sub-region has a population of approximately 40,000. It is the 39th most populous municipality in Finland.