Ernie Duplechin (c. 1932 – December 24, 2020) was an American football coach and college athletics administrator. He served as the head football coach at the McNeese State University from 1979 to 1981, compiling a record of 28–6–1. Duplechin was the athletic director at McNeese State from 1980 to 1985. Duplechin died at the age of 88, on December 24, 2020.