Karl Nars (August 13, 1874 – January 21, 1952) was a well known industrialist in Jakobstad in the first half of the 20th century.
As of 1934, Nars was the owner of the steampowered sawmill in Jakobstad (Swedish: Jakobstad ångsåg).
Karl Nars and his sons founded and developed the Nars Industries (Swedish: Narska företagen) into a significant industrial group, mainly in the areas of timber and wood processing, as well as in plastics manufacturing.