Mark Edward Lenzi (born July 4, 1968 in Huntsville, Alabama) is a former American Olympic diver and diving coach. Lenzi is known for his Olympic gold medal in the 1992 Olympic Games, and his Olympic bronze medal in the 1996 Olympic Games on the 3m springboard.
Lenzi was also the first American diver to perform a 109C (forward 4.5 somersault tuck) in competition, and the first diver to score over 100 points in competition, performing a 307C (reverse 3.5 somersault tuck) off of the 3m springboard for over 102 points.
After briefly retiring from diving shortly after the Olympics, Lenzi returned to the sport in late 1995. Lenzi qualified for the 1996 Olympic team on the 3m springboard despite an injured shoulder, and won a bronze medal behind Xiong Ni and Yu Zhoucheng.
In total, Lenzi has won 18 international competitions at the 1m and 3m springboard level. He also became the first American diver to perform a 109C in competition, and the first diver to score over 100 points on a single dive in competition.