Köyliö (Kjulo in Swedish) is a municipality of Finland. It is located in the province of Western Finland and is part of the Satakunta region. The municipality has a population of 2,953 (2003) and covers an area of 259.36 km² of which 13.11 km² is water. The population density is 11.2 inhabitants per km². The municipality is unilingually Finnish. It is said that the peasant Lalli murdered the Swedish bishop Henry on the ice of lake Köyliö in 1155 AD. Municipalities of Satakunta Region KöyliöKöyliöKöyliöKöyliöKöyliöKöyliöKöyliöKjulo