John Grady may refer to: John C. Grady (1847-1916), American lawyer and politician John D. Grady (died 1880), American criminal John Grady (baseball) (1858–1924), American baseball player John Grady (Medal of Honor) (1872–1956), United States Navy officer and Medal of Honor recipient John Grady (sociologist) (born 1960s) American sociologist John Grady (author) (1923–1986), Australian author and social scientist John F. Grady (1929–2019), U.S. federal judge