Coordinates: 20°25′38″S 51°20′37″W / 20.42722°S 51.34361°W / -20.42722; -51.34361
Ilha Solteira is a municipality in the state of São Paulo in Brazil. The population in 2004 is 25,168 and the area is 661.34 km². The elevation is 335 m. This city was named after a nearby hydroelectric power plant.