Kylmäkoski is a former municipality of Finland. It was consolidated with the town of Akaa on 1 January 2011. It was located in the Pirkanmaa region. The municipality had a population of 2,610 and covered a land area of 190.96 square kilometres. At the end of 2011, the urban area of Kylmäkoski had 674 inhabitants. The population density was 13.67 in…Kylmäkoski is a former municipality of Finland. It was consolidated with the town of Akaa on 1 January 2011. It was located in the Pirkanmaa region. The municipality had a population of 2,610 and covered a land area of 190.96 square kilometres. At the end of 2011, the urban area of Kylmäkoski had 674 inhabitants. The population density was 13.67 inhabitants per square kilometre. The municipality was unilingually Finnish.