Wijda Mazereeuw (born 11 August 1953) is a retired swimmer from the Netherlands. Individually she competed in the 200 m and 400 m medley event at the 1972 Summer Olympics and in the 100 m and 200 m breaststroke at the 1976 Summer Olympics, but was eliminated in the heats on all occasions; in 1976 she also placed fifth with the Dutch 4 × 100 m medley relay team. At the 1975 World Aquatics Championships in Cali, Colombia, she won silver medals in the 100 m (1:14.29) and 200 m (2:37.50) breaststroke; she was also part of the Dutch 4 × 100 m medley relay team that won the bronze medal with a time of 4:21.45.
Mazereeuw competed at the 1974 and 1977 European championships, with the best result of fourth place with the 4 × 100 m medley relay team in 1976. Between 1972 and 1977 she set 15 national records in various events.