John Bennett was an English organist and composer.
Details of Bennett's life are limited, but it is known that he died in September 1784, after serving as organist at St. Dionis Backchuch Fenchurch in London, for over thirty years. He had been a pupil of Johann Christoph Pepusch.
As the typical versatile eighteenth-century English musician, he played the organ and the viola, taught the harpsichord, and performed at Drury Lane Theatre as a singer in the chorus and as a dancer. According to Thomas Mortimer's The Universal Director (1763), he lived at Queen-square Bloomsbury, and succeeded Charles Burney as organist at St. Dionis-Backchurch, Fenchurch Street (demolished in 1878), in 1752.