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 GoalkeeperBill McKnight (born 1940), former Canadian politicianBrian McKnight (born 1969), Grammy-nominated American singer, songwriter, arranger, and producerChad McKnight (born 1984), American professional basketball playerCharles McKnight (1750–1791), American physicianClaude V. McKnight III (21st century), gospel music singerConner McKnight, a fictional character in the Power Rangers universeDennis McKnight (born 1959), former American football guardDenny McKnight (1848–1900), founding owner of the Pittsburgh Allegheny baseball clubDenyss McKnight (born 1982), Canadian electronic musicianDeWayne "Blackbyrd" McKnight (21st century), American guitaristDodge MacKnight (1860–1950), American painterElla Macknight (1904–1997), Australian obstetrician and gynaecologistGuy McKnight (21st century), lead singer of the band The Eighties Matchbox B-Line DisasterIan McKnight (21st century), Jamaican activistRev James MacKnight DD (1721–1800), Moderator of the General Assembly of the Church of Scotland 1769 and religious authorJames McKnight (born 1972), former American football wide receiverJeff McKnight (born 1963), Major League Baseball playerJim McKnight (1936–1994), Major League Baseball playerJoe McKnight (1988–2016), American football tailbackLinda McKnight (21st century), double bassistMarc McKnight (born 1983), current bassist and backing vocalist for the metalcore band AtreyuMarian McKnight (born 1936), Miss America 1957Matt McKnight (born 1984), Canadian professional ice hockey playerReginald McKnight (21st century), American short story author and novelistRhema McKnight (born 1984), wide receiver for the University of Notre Dame's American football teamRobert McKnight (1820–1885), Republican United States Representative from PennsylvaniaScot McKnight (21st century), New Testament scholarSidney McKnight (born 1955), retired boxerSumner McKnight Crosby (1909–1982), archaeologistTed McKnight (born 1954), former professional American football running backTerence E. McKnight (21st century), United States Navy admiralThomas Macknight (1829–1899), Anglo-Irish newspaper editor, biographer and publisherThomas McKnight (born 1941), American artistThomas McKnight (Iowa pioneer), American businessman, politicianTim McKnight, American biologistTom McKnight, English footballerTony McKnight (born 1977), retired Major League Baseball pitcherWes McKnight (1909–1968), Canadian television and radio personalityWilliam "Willie" McKnight (1918–1941), Royal Air Force officerWilliam L. McKnight (1887–1978), American businessmanWilliam McKnight (born c. 1841), United States Navy sailor