Donald John is a first and middle name and may refer to:
Politicians Donald John Trump (born 1946), 45th president of the United States Donald John Trump Jr. (born 1977), son of Donald Trump Donald John Bacon (born 1963), United States representative Donald John Lee (1927–2011), former United States district judge Donald John Bowman (1936–2013), Australian politician Huan Donald John Fraser (1940–2010), Australian politician
Scientists Donald John Markwell (born 1959), Australian social scientist Donald John McGillivray (1935–2012), Australian botanical taxonomist Donald John Wiseman (1918–2010), British archaeologist Donald John Logan Bennet (born 1957), British archaeologist Donald John Pinkava (1933–2017), American botanist Donald John Lewis (1926–2015), American mathematician
Sportsmen Donald John May (born 1946), American basketball player Donald John Allan (born 1949), Australian cyclist Donald John Deacon (1912–1943), Canadian ice hockey player Donald John Bacon (born 1935), American MiLB player
Businessmen Donald John Tyson (1930–2011), American businessman and CEO of Tyson Foods Donald John Roberts (born 1945), Canadian-American economist
Military personnel Donald John Dean (1897–1985), English recipient of the Victoria Cross Donald John Stott (1914–1945), New Zealand soldier
Other Donald John Cameron (1993–2016), New Zealand journalist Donald John Smith (1926–2014), English priest
See also Don John (disambiguation) John Donald (disambiguation)