Koll Guitar Co. is a small-batch electric and semi-acoustic guitar maker founded in 1986 by luthier Saul Koll. Instruments are handcrafted in Portland, Oregon, with sales and marketing run out of Brooklyn, New York by co-partner Gary Hustwit. Koll got his start apprenticing with his uncle, Rhode Island luthier Steve Senerchia, and trained professionally at World of Strings in Long Beach, California under violin maker Jon Peterson before setting up his own shop.

The company is best known for the Glide body shape, an offset design Saul Koll developed in the early 1990s that has become the foundation for most of the line. Models include the Junior, Troubadour, Super Cub, Duo Glide, Super Glide Almighty, and Ultra Glide, with frequent baritone and semi-hollow variations. The shop emphasizes FSC-certified, sustainably harvested tonewoods and domestically sourced hardware, and the brand's visual identity was designed by Aaron Draplin.

Koll guitars have been used by a range of players across indie, avant-garde, and mainstream genres, including Bill Frisell, David Torn, Lee Ranaldo of Sonic Youth, Isaac Brock of Modest Mouse, Peter Holmstrom of The Dandy Warhols, Hershel Yatovitz of Chris Isaak's band, and Adam Levy.

Koll has 8 products cataloged on Equipboard, including Solid Body Electric Guitars, Semi-Hollowbody Electric Guitars, and Overdrive Effects Pedals. Their gear is featured by 9 artists, with the strongest followings in Rock, Folk, World, & Country, and Pop. Notable users include Isaac Brock, Lee Ranaldo, and David Torn.