John Ely may refer to:
John Ely (baseball) (born 1986), American professional baseball player John Ely (New York politician) (1774–1849), American politician from New York
John Hart Ely (1938–2003), American legal scholar John Ely (Iowa politician) (1919–2007), American politician from Iowa John J. Ely (1778–1852), American politician from New Jersey John Ely (surgeon), American Revolutionary War surgeon and colonel