John Roach

John Roach may refer to any of the following:
 * John Roach (shipbuilder) (1816–1887), United States shipbuilder
 * John Roach (bishop) (1921–2003), bishop of the Catholic Church
 * John Roach (baseball) (1867–1934), former Major League Baseball pitcher
 * John Roach (footballer, born 1862), Welsh international footballer
 * John Roach (American football) (1933–2021), football player
 * John Roach (English footballer), English footballer played for Manchester United, FC Sète, and Accrington Stanley
 * John C. Roach, justice on the Kentucky Supreme Court
 * John Ross Roach (1900–1973), Canadian ice hockey player
 * John Vinson Roach II (1938–2022) pioneer of the personal computer