John Riley Maxwell (July 16, 1871 – June 3, 1906) was an American golfer who competed in the 1904 Summer Olympics.
In 1900, Maxwell won the inaugural Iowa Amateur. He also won the Trans-Mississippi Amateur in 1903.
In 1904, Maxwell was part of the American team which won the silver medal. He finished 21st in this competition.
Maxwell died in Keokuk, Iowa.
In 2011, Maxwell was inducted into the Iowa Golf Hall of Fame.