Cornelius W. Wiebe, CM (February 18, 1893 – July 12, 1999) was a Canadian physician and politician.Wiebe was born to a Mennonite family in Altona, Manitoba. He was educated at Wesley College, the University of Manitoba and the Manitoba Medical College, receiving his MD in 1925. He practiced family medicine in Winkler, Manitoba from 1925 to 1978, and, according to local tradition, continued to practice on an informal basis after his retirement.