Ponsati or Ponsatí is a Spanish surname. Notable people with the surname include:
Clara Ponsatí (born 1957), Catalan economist and politician Nemesi Ponsati (1887–1980), Spanish pharmacist, pedagogue, and sports leader Josep Ponsatí (born 1947), Catalan artist Biel Vicens Ponsati (born 2004), Spanish footballer