Hetty Balkenende (also spelled Hettie, born 1939) is a former freestyle swimmer and synchronized swimmer from the Netherlands who won a silver medal in the 4×100 m freestyle relay at the 1954 European Aquatics Championships. In 1955, she helped the Dutch team to set the world record in the same event; she also won two national titles (100 m and 400 m freestyle), broke two national records in the 400 m freestyle, and the world record on the 880 yards – all in one year.