Lyn achieved fame as a 17-year-old when she won the gold medal in the women’s 100m butterfly at the Mexico City Olympics in 1968.
In the same year she was named West Australian sportsperson of the year.
Lyn grew up in Lockhart Street, Como, and attended Manning Primary School.
More than 220 people attended this year’s lunch, which was held exactly a week before the opening ceremony for the London Olympics.
Mr McGrath introduced the South Perth legend concept when he was first elected to Parliament in 2005.
“It occurred to me that there are so many people who grew up in the South Perth district who have gone on to greatness in sport” he said. “I decided it was time to recognise them. So I hold a South Perth legends lunch every year and it has become very popular.
“Naturally, with my background as a sportswriter I have concentrated on that area in the early inductees.
“South Perth is a wonderful community and I think we are all very proud of those among us who have done well.”
Mr McGrath said he has used the lunches to provide financial assistance to junior sporting clubs in the district.
Part proceeds of this year’s lunch will be donated to the Wesley South Perth Junior Hockey Club and the Royal Life Saving Association.
Other winners of the award have been test cricketer Bruce Laird, footballers Ben Cousins, Allan Stiles and Ian Miller and horse trainer Fred Kersley.