Heinz Frei (born 28 January 1958) is a Swisswheelchair athlete. Frei has had a long career of racing, winning the London Marathon wheelchair race three times, and earning five medals at the 2003 European games at the age of 45. He has earned 14 gold medals at the summer and winter Paralympics and is a current world record holder in the half-marathon and marathon wheelchair races. He competed in athletics at every Summer Paralympic Games from 1984 to 2008, and at the 2008 Beijing Games he also participated in cycling, using a handcycle. At the Winter Paralympics, he competed in cross-country sit-skiing between 1984 and 2006 and in the biathlon in 1994.
Frei plans on retiring from track competition at an event on 28 August 2009, though he will continue competing in road races.