Ruovesi is a municipality of Finland. It is located in the Pirkanmaa region. The municipality has a population of 4,101 and covers an area of 950.16 square kilometres of which 173.97 km2 is water. The population density is 5.28 inhabitants per square kilometre. Neighbouring municipalities are Juupajoki, Mänttä-Vilppula, Orivesi, Tampere, Virrat and Ylöjärvi. The municipality is unilingually Finnish. Helvetinjärvi National Park is located in Ruovesi.