McKinnon, MacKinnon or Mackinnon is a Scottish surname. (Gaelic: Mac Fhionghain),

Notable people with this surname include:

• Allan McKinnon, P.C., M.C., C.D. (1917–1990), Canadian politician, MP – Victoria 1972-1988
• Alexander "Alex" McKinnon (1895–1949), Canadian professional hockey forward
• Alexander J. McKinnon (1856–1887) American Major League Baseball first baseman
• Angus MacKinnon, Scottish footballer (Queen's Park, Scotland)
• Angus McKinnon (1886–1968), Scottish footballer (Arsenal)
• Angus McKinnon Young (born 1955), Australian Lead Guitarist of band AC/DC and co-founder of AC/DC
• Atholl McKinnon (1932–1983), South African cricketer
• Barry McKinnon (born 1944), Canadian poet
• Betty McKinnon (born 1924), Australian sprinter, silver medal – 4 x 100 metre relay – 1948 Summer Olympics in London
• Bill or Billy Mackinnon, several people
• Bob MacKinnon, American basketball coach
• Bob MacKinnon Jr. (born 1960), American basketball coach
• Casey McKinnon (born 1978), Canadian producer & star of Galacticast
• Catharine MacKinnon, American feminist (born 1946)
• Catherine McKinnon (born 1944), Canadian actress and folk & pop singer
• Cedric McKinnon (1968–2016), American football player
• Clinton "Bär" McKinnon (born 1969) American saxophone musician in Melbourne, Australia
• Clinton Dotson McKinnon (1906–2001) American politician
• Colin Francis MacKinnon, (1810–1879), Canadian Roman Catholic Archbishop
• Dan Mackinnon, (1903–1983), Australian politician
• Dave MacKinnon, Scottish professional football player
• David MacKinnon (born 1994), American baseball player
• Dennis Lewis McKinnon (born 1961), professional American NFL football player
• Donald McKinnon (disambiguation), several people, including:
  • Don McKinnon (born 1939), New Zealand politician
  • Donald Alexander MacKinnon (1863–1928), Canadian teacher, lawyer, politician and author
  • Donald Mackinnon (1859–1932), Australian politician
  • Donnie McKinnon (born 1940), Scottish footballer
• Ellen MacKinnon (1926–2001), Canadian politician
• Esther Blaikie MacKinnon (1885–1934), Scottish artist
• Francis MacKinnon (1848–1947), British cricketer
• Frank Douglas MacKinnon (1871–1946), English lawyer, judge and writer
• Frank McKinnon (1934–2015), Canadian sports executive
• Fred McKinnon (b. 196?), American basketball player
• Gary McKinnon (born 1966), British computer hacker
• George Edward MacKinnon (1906–1995), American politician
• Gillies MacKinnon, Scottish film director
• Glen McKinnon (born 1937), Canadian educator and Liberal Party politician
• Harry McKinnon (1910–1989), Australian rugby league footballer and administrator
• Hector McKinnon CC, CMG (1891–1981) Canadian government civil servant
• James MacKinnon (disambiguation), several people

• Jana McKinnon, Australian actress, plays the lead role in 2023 TV series Bad Behaviour
• Janice MacKinnon (born 1947), Canadian historian
• John McKinnon (disambiguation), several people, including:
  • John Kenneth McKinnon (born 1936), Canadian politician & Commissioner of the Yukon (1986–1995)
  • John McKinnon (ophthalmologist) (born 1938), New Zealand mountaineer and ophthalmologist
  • John Walter McKinnon (born 1950), New Zealand diplomat and public servant
  • Johnny McKinnon (1902–1969), Canadian professional NHL hockey player
• Jon MacKinnon, Canadian field hockey player
• Kate McKinnon (born 1984), comedian
• Lachlan Mackinnon, Scottish poet, critic and literary journalist
• Sir Lachlan Mackinnon (clan chief), 17th century chief of the Clan Mackinnon
• Leila McKinnon (born 1972), Australian TV reporter
• Marguerite McKinnon (born 1970), Australian journalist
• Malcolm McKinnon (born 1950), New Zealand historian
• Mark McKinnon (born 1955), adviser to President Bush
• McKay McKinnon, American plastic surgeon
• Murdock MacKinnon (1865–1944), Canadian politician
• Nathan MacKinnon, Canadian hockey player
• Neil Mackinnon, 17th century minister in the Isle of Skye
• Peter MacKinnon, Canadian lawyer and academic
• Rebecca MacKinnon, American journalist
• Roderick MacKinnon, Nobel laureate
• Ronald McKinnon (born 1973), American football
• Ronnie McKinnon (born 1940), Scottish footballer
• Ross McKinnon (b.????) Australian rugby league player
• Sam Mackinnon, Australian basketball player
• Simmone Jade Mackinnon, Australian actress
• Wade McKinnon (born 1981) Australian NRL rugby player
• Walter McKinnon (1910–1998), senior officer in the New Zealand Army
• William Mackinnon (disambiguation), several people