DiMarzio is an American manufacturer based in Staten Island, New York, best known for pioneering the direct-replacement aftermarket guitar pickup. Founded by Larry DiMarzio in 1972, the company grew out of his work repairing guitars for professional musicians during a period when major instrument manufacturers had been acquired by larger corporations and were cutting costs on component quality. DiMarzio's response was to build pickups that outperformed stock units and sell them directly to players looking to upgrade their instruments.

The company's first major product, the Super Distortion humbucker, combined a ceramic magnet with smaller-gauge wire wound to higher output, giving rock guitarists heavier tones without relying on fuzz pedals. The FS-1, a Stratocaster bridge pickup developed to tame the shrillness of stock single-coils, was another early offering. DiMarzio went on to establish itself as a leader in artist signature pickups, working closely with guitarists to develop models matched to their specific playing styles. Signature designs include the Evolution (developed with Steve Vai), the Mo' Joe and PAF Joe (developed with Joe Satriani), and models for players including Paul Gilbert, John Petrucci, Yngwie Malmsteen, and Tosin Abasi.

Beyond pickups for electric guitar and bass, DiMarzio also produces guitar straps, instrument cables, and other accessories. The company offers both traditional passive designs—single-coils, humbuckers, and split-coil bass pickups—as well as active models and pickups for extended-range instruments. All DiMarzio pickups are manufactured in the United States.

DiMarzio has 188 products cataloged on Equipboard, including Electric Guitar Pickups, Straps & Strap Locks, and Bass Guitar Pickups. Their gear is featured by 343 artists, with the strongest followings in Rock, Metal, and Jazz. Notable users include John Petrucci, Paul Gilbert, and Steve Vai. Most DiMarzio products fall in the mid-tier range — professional-grade without flagship pricing.