Mario Martin Guitars is a boutique electric guitar builder based in Murfreesboro, Tennessee, operating out of a roughly 4,000-square-foot facility known as Guitar Mill. Founded by luthier Mario Martin, the company specializes in vintage-recreation instruments inspired by the California-built guitars of the 1950s and 1960s, with an emphasis on hand-applied nitrocellulose finishes and realistic relic work. Before launching his own shop, Martin worked at the Gibson factory in Nashville and spent several years at Fender's Nashville operation, where he trained under master luthier Evan Ellis.

The brand's lineup centers on S-style and T-style solidbody guitars, offered in a range of body styles and often built with lightweight Paulownia bodies. Guitars are finished and assembled in-house, with pickup options from makers such as Lollar commonly fitted. The operation began under the Guitar Mill name in 2006 and was formally rebranded as Mario Guitars in 2011.

Mario Guitars have been covered by publications including Premier Guitar, Guitar Player, and Guitar World, and have been played by country and rock artists such as Brothers Osborne, Vince Gill, Randy Houser, Hunter Hayes, and Chase Bryant.

Mario Martin has 2 products cataloged on Equipboard, including Solid Body Electric Guitars. Their gear is featured by 1 artist, with the strongest followings in Rock. Notable users include Tim Pierce.