Seulo is a comune in the Province of South Sardinia in the Italian region Sardinia, located about 70 kilometres north of Cagliari. As of 31 December 2004, it had a population of 970 and an area of 58.8 square kilometres. It borders the following municipalities: Aritzo, Arzana, Gadoni, Sadali, Seui, Villanova Tulo. Seulo holds the record of 20 centenarians from 1996 to 2016, making it the place where people live the longest in the world.