Águas de São Pedro (Portuguese pronunciation: [ˈaɡwas di sɐ̃w̃ ˈpedɾu] ( listen)) is a Brazilian municipality of the state of São Paulo. It is the second smallest Brazilian municipality in territorial extension, with only 5.537 km², and had a population of 2,703 in 2010. Águas de São Pedro means "Waters of Saint Peter". Its name is derived from the mineral springs in its territory and their location, that before its foundation, were part of the municipality of São Pedro (São Pedro is the Portuguese for Saint Peter).