Donald W. Ernst (born January 25, 1934) is an American film, music and sound editor and film producer. He commonly works in the animation industry.
Ernst started his career in television serving as editor on Gilligan's Island, Cimarron Strip and Gunsmoke, he later moved on to film editing. Ernst went to work at Ralph Bakshi's studio editing movies such as Coonskin, The Lord of the Rings, Wizards and Hey Good Lookin'.
Upon joining Disney, Ernst got a chance to produce films such as Aladdin, Homeward Bound: The Incredible Journey and Fantasia 2000. He also produced the English voice adaptation of Spirited Away.