McCaig is a surname. Notable people with the surname include:
Bud McCaig (1929–2005), Canadian businessman Dave McCaig (born 1971), Canadian cartoonist and colorist David McCaig (born 1956), Scottish footballer Donald McCaig (1940–2018), American writer Doug McCaig (1919–1982), Canadian ice hockey player John Stuart McCaig (1823–1902), Scottish architect Iain McCaig (born 1957), Canadian illustrator
See also McCaig's Tower, Folly building in Scotland, United Kingdom Norman MacCaig (1910–1996), Scottish Poet (Father's surname spelled McCaig)