Rebecca Collins (born 1944) is a retired American swimmer.

On July 20, 1958, she set a new world record in the individual 200 m medley.

One year later, on July 19, 1959, she broke the world record of Tineke Lagerberg in the 200 m butterfly.

She was also part of the US relay team that set a new world record in the 4×100 m medley at the 1959 Pan American Games.

Between 1959 and 1961 she won seven national titles in individual butterfly and medley events.