The Fender Duo-Sonic is an electric guitar launched by Fender Musical Instruments Corporation as a student model guitar, an inexpensive model aimed at amateur musicians. It was referred to as a "3/4 size" Fender guitar.

The Fender Musical Instruments Corporation is an American manufacturer and marketer of musical instruments and amplifiers. Fender produces acoustic guitars, bass amplifiers and public address equipment; however, it is best known for its solid-body electric guitars and bass guitars, particularly the Stratocaster, Telecaster, Jaguar, Jazzmaster, Precision Bass, and the Jazz Bass. The company was founded in Fullerton, California, by Clarence Leonidas "Leo" Fender in 1946. Andy Mooney has served as the chief executive officer (CEO) since June 2015.