John Campbell Bonner Letts (November 18, 1929 – March 25, 2006) was an English publisher, who founded the British Empire and Commonwealth Museum and was instrumental in setting up the short-lived Earth Centre, Doncaster.
He was also the prime mover behind the Trollope Society which celebrates the work of the Victorian novelist Anthony Trollope. The Society published the first complete edition of Trollope's 47 novels.