Simon Lessing (born February 12, 1971) is an athlete from the United Kingdom. He competes in triathlon.

Lessing competed at the first Olympic triathlon at the 2000 Summer Olympics. He took ninth place with a total time of 1:49:24.32.

Simon Lessing, now of Boulder, Colorado, qualified for 2005 Hawaii Ironman World Championships, by taking 4th place at Ironman Canada in Penticton, B.C., August 28th, 2005, in a time of 8:43:13. October 15th, 2005 will be Simon's second go at Kona, Hawaii. Last year (2004) he dropped out halfway into the bike leg, due to fierce winds and problems with his back.

In 2005 he set a new half-Ironman course record at the famous Wildflower triathlon.

1971 births | Living people | British triathletes | Triathletes at the 2000 Summer Olympics | Olympic competitors for Great Britain