John Ryerson (c. 1800 - ?) was a circuit rider in the Methodist Episcopal Church.
In 1820, Ryerson was appointed to ride on the Long Point circuit by the Presiding Elder of Upper Canada. In 1821, he was accepted on trial as a circuit rider by the Genesee Conference. He was again assigned to the Long Point circuit, where he rode alongside Daniel Shepherdson.[1][2] The pair oversaw an increase in church membership from 579 to 594.[3] In 1822, he was assigned to the Niagara circuit, where he rode alongside Ezra Adams.[4] In 1823, he was assigned to the Yonge Street circuit, where he rode alongside William Slater. Circuit membership increased that year by 31 to 330.[5]