Mark Charles Wiebe (born September 13, 1957) is an American professional golfer who currently plays on the Champions Tour. He has also played on the PGA Tour and Nationwide Tour.
Wiebe was born in Seaside, Oregon and grew up in Escondido, California. He attended Palomar College from 1976–77, then San Jose State University from 1978–79, and was a member of the golf team at both institutions. While a student at Palomar, he was the individual medalist at the 1977 California Amateur Championship; and he holds the Palomar school record for low round at 6-under-par (66). He turned pro in 1980 and joined the PGA Tour in 1983.
Wiebe has about four dozen top-10 finishes in PGA Tour events including two wins. His first win came in 1985 at the Anheuser-Busch Golf Classic when he beat John Mahaffey with a birdie on the first extra hole in a sudden-death playoff. In 1986, he won the Hardee's Golf Classic and finished 25th on the final money list. Wiebe's best finish in a major was a T-12 at the 1989 PGA Championship.