The Bells of San Juan is a novel by American author Jackson Gregory, published in 1919. It is a western adventure story set in a small California town, where a new sheriff faces a gang of outlaws led by Jim Galloway, a ruthless and ambitious criminal. The novel also features a romance between the sheriff and a young woman doctor, who helps him recover from a head injury that changes his personality. The title refers to the mission bells that ring to announce different events in the town, such as births, deaths, fires, weddings, and discoveries of gold. The novel was adapted into a silent film in 1922, starring Buck Jones as the sheriff.