McKnight (also MacKnight, Macknight) is a Scottish (Ulster-Scots) surname. It is a derivative of the surname MacNaught/McNaught. Notable people with the surname include:
Allen McKnight (born 1964) former Northern Irish & Glasgow Celtic Goalkeeper
Bill McKnight (born 1940), former Canadian politician
Brian McKnight (born 1969), Grammy-nominated American singer, songwriter, arranger, and producer
Chad McKnight (born 1984), American professional basketball player
Charles McKnight (1750–1791), American physician
Claude V. McKnight III (21st century), gospel music singer
Conner McKnight, a fictional character in the Power Rangers universe
Dennis McKnight (born 1959), former American football guard
Denny McKnight (1848–1900), founding owner of the Pittsburgh Allegheny baseball club
Denyss McKnight (born 1982), Canadian electronic musician
DeWayne "Blackbyrd" McKnight (21st century), American guitarist
Dodge MacKnight (1860–1950), American painter
Ella Macknight (1904–1997), Australian obstetrician and gynaecologist
Guy McKnight (21st century), lead singer of the band The Eighties Matchbox B-Line Disaster
Ian McKnight (21st century), Jamaican activist
Rev James MacKnight DD (1721–1800), Moderator of the General Assembly of the Church of Scotland 1769 and religious author
James McKnight (born 1972), former American football wide receiver
Jeff McKnight (born 1963), Major League Baseball player
Jim McKnight (1936–1994), Major League Baseball player
Joe McKnight (1988–2016), American football tailback
Linda McKnight (21st century), double bassist
Marc McKnight (born 1983), current bassist and backing vocalist for the metalcore band Atreyu
Marian McKnight (born 1936), Miss America 1957
Matt McKnight (born 1984), Canadian professional ice hockey player
Reginald McKnight (21st century), American short story author and novelist
Rhema McKnight (born 1984), wide receiver for the University of Notre Dame's American football team
Robert McKnight (1820–1885), Republican United States Representative from Pennsylvania
Scot McKnight (21st century), New Testament scholar
Sidney McKnight (born 1955), retired boxer
Sumner McKnight Crosby (1909–1982), archaeologist
Ted McKnight (born 1954), former professional American football running back
Terence E. McKnight (21st century), United States Navy admiral
Thomas Macknight (1829–1899), Anglo-Irish newspaper editor, biographer and publisher
Thomas McKnight (born 1941), American artist
Thomas McKnight (Iowa pioneer), American businessman, politician
Tim McKnight, American biologist
Tom McKnight, English footballer
Tony McKnight (born 1977), retired Major League Baseball pitcher
Wes McKnight (1909–1968), Canadian television and radio personality
William "Willie" McKnight (1918–1941), Royal Air Force officer
William L. McKnight (1887–1978), American businessman
William McKnight (born c. 1841), United States Navy sailor
