Lorraine Joyce Thurlow, AM (born 1 October 1938), née Crapp, is a former Olympic swimming champion representing Australia.

In world swimming history, Crapp earned a place as the first woman to break the five-minute barrier in the 400 m freestyle.

In 1952, Crapp was selected in the New South Wales team for the Australian Championships in Melbourne, where she came second to Olympian Judy Davis in the senior 880 yards.

On the eve of her departure for the 1960 Rome Games, Crapp married Dr. Bill Thurlow, a medical officer attached to the Australian team.

[4] In 1964, Thurlow won a 100,000 pounds lottery prize, which he planned to use for setting up a health centre for disabled people.

"[8] On 8 February 2000, Crapp was awarded the Australian Sports Medal in recognition of her and teammates' efforts in winning the 4 × 100 m freestyle relay at the 1956 Olympics.