Warmoth Guitar Products is a Puyallup, Washington-based manufacturer of replacement guitar and bass parts, founded in 1980 by Ken Warmoth after he left Boogie Bodies. The company specializes in made-in-USA necks and bodies built to fit Fender-style instruments, offering an extensive online custom builder that lets players configure everything from body shape and wood combinations to neck profile, fretboard radius, and hardware routing.

Warmoth is credited as a pioneer of the Strat-compatible aftermarket parts industry and is known for innovations such as the compound-radius fretboard and the laminated forearm contour used on its drop-top bodies. Its catalog spans Strat, Tele, Jazzmaster, Mustang, and Jaguar-style bodies, along with bass equivalents like Jazz Bass and Precision Bass shapes, plus the company's own designs such as the Dinkycaster. Parts are offered in a wide range of tonewoods, including exotic options rarely seen from major manufacturers.

Production blends CNC-cut blanks with hand finishing — fretwork, binding, and spraying are done by hand at the South Hill facility. The company primarily serves home builders, boutique luthiers, and small-scale manufacturers looking for custom-spec components, and operates as a family business continued by Ken Warmoth's daughter Sandy Warmoth Hosfelt.

Warmoth has 23 products cataloged on Equipboard, including Solid Body Electric Guitars, Electric Basses, and Guitar Necks. Their gear is featured by 16 artists, with the strongest followings in Rock, Metal, and Electronic. Notable users include Chris Shiflett, Vic Fuentes, and Alex Turner.