Valkeakoski is a town and municipality in Finland. It is located 35 kilometres south of Tampere, 45 km north of Hämeenlinna and 150 k…Valkeakoski is a town and municipality in Finland. It is located 35 kilometres south of Tampere, 45 km north of Hämeenlinna and 150 km north of Helsinki in the Pirkanmaa region. The municipality has a population of 20,816 and covers an area of 372.03 square kilometres of which 100.06 km² is water. The population density is 76.52 inhabitants per square kilometre.