Ontario Knife Company (OKC) was an American manufacturer of knives and military tools.

On August 1, 2023, OKC was acquired by Blue Ridge Knives and subsequently closed.

The lineup includes the original RTAK (formerly produced by Newt Livesay Blades), and the TAK-1 and RAT-7, both of which have been adopted by the U.S.

[citation needed] Ontario Knife Company has also collaborated with other designers[3] such as Justin Gingrich, Bram Frank, and Bowie Knife knife-maker Bill Bagwell, introducing lower cost renditions of several of Bagwell's designs.

Ontario Knife Company was also a major supplier of private label blades and knives.