Mark Acheson is a Canadian film and TV actor and voice artist. Acheson first appeared in the feature film Skip Tracer (1977) and has since accumulated over 200 professional credits.

Acheson has been in numerous TV shows including Supernatural, Motive, The X-Files, and Smallville. Acheson has voiced characters of Lord Tirek from My Little Pony: Friendship Is Magic, Sabretooth from Hulk Vs. Wolverine, and has provided the voice of many characters in the TV show Transformers. Acheson's most recent work includes the Emmy winning mini-series Fargo, and animated feature Saving Goola (2014).