John McDonald may refer to:

• John McDonald (Australian politician) (1969–1934), Member of the Western Australian Legislative Assembly from 1911 to 1914
• John McDonald (baseball), a reserve Major League Baseball infielder for the Toronto Blue Jays
• John McDonald (Maryland), Maryland politician.
• John McDonald (mayor), mayor of Dunedin, New Zealand from 1908 to 1909
• John McDonald (Medal of Honor) (1817-?), American Civil War sailor and Medal of Honor recipient
• John Wade McDonald, American Civil War soldier and Medal of Honor recipient