Catharina Bernadetta Jacoba ("Tineke") Lagerberg (born 30 January 1941) is a retired Dutch swimmer who won the bronze medal in the 400 m freestyle at the 1960 Summer Olympics in a time of 4:56.9. She was also part of the Dutch team that broke the 4×100 m medley Olympic record in the preliminaries; however, they finished fourth in the final. Lagerberg broke the world record in the women's 200 m butterfly on 13 September 1958 in Naarden, Netherlands. She was also part of the Dutch relay team that set a new world record in the 4×100 m medley in the same year.