Millar is a surname. It may refer to:

• Alan Millar (born 1947), head of philosophy at the University of Stirling
• Alex Millar (born 1985), British professional poker player
• Andrew Millar (1707–1768), British publisher and bookseller
• Bill Millar (born 1950), Scottish-born Canadian soccer player
• Blair Millar (born 1956), Scottish footballer
• Brian Millar (born 1966), Irish cricketer
• Charles Vance Millar (1853–1926), Canadian lawyer and financier
• Chris Millar (born 1983), Scottish footballer
• Craig Millar (ice hockey) (born 1977), Canadian professional hockey player
• Darren Millar (born 1976), Welsh politician
• Dave Millar (born 1945), Scottish footballer
• David Millar (born 1977), Scottish road racing cyclist
• Derek Millar (born 1962), Burmese musician
• Duncan Millar (1824–1881), Scottish recipient of the Victoria Cross
• Fergus Millar (1935–2019), British historian
• Frederick Millar, 1st Baron Inchyra (1900–1989), British diplomat
• Gavin Millar (1938–2022), Scottish film director
• Geoff Millar (born 1955), Australian cricketer
• Gertie Millar (1879–1952), English singer and actress
• George Millar (footballer) (born 1874), Scottish footballer
• George Millar (singer) (born 1947), Irish singer-songwriter, of The Irish Rovers
• George Millar (writer) (1910–2005), Scottish journalist, World War II soldier and writer
• H. R. Millar (1869–1940), Scottish graphic artist and illustrator
• Huntly D. Millar (1927–2016), founder of Millar Instruments, Inc.
• Ian Millar (born 1947), Canadian show jumper
• James Millar (disambiguation)
• John Millar (disambiguation)
• Joseph Millar, American poet
• Judy Millar (born 1957), New Zealand artist
• Kevin Millar (born 1971), American baseball player
• Liam Millar (born 1999), Canadian professional soccer player
• Maggie Millar (born 1941) Australian actress
• Marc Millar (born 1969), Scottish footballer
• Margaret Millar (1915–1994), American-Canadian mystery and suspense writer
• Mark Millar (born 1969), Scottish comic book writer
• Mark Millar (footballer) (born 1988), Scottish footballer
• Mary Millar (1936–1998), English actress
• Martin Millar, Scottish author
• Matt Millar (born 1985), Australian (soccer) footballer
• Mike Millar (born 1965), Canadian hockey player
• Miles Millar (b 1970), British screenwriter and producer
• Norman S. Millar (1887–1938), Presbyterian minister in Brisbane, Australia
• Oliver Millar (1923–2007), British art historian
• Paul Millar (disambiguation)
• Peter Millar (disambiguation)
• Renton Millar (born 1975), Australian professional vertical skateboarder
• Robbie Millar (1967–2005), Northern Irish chef and restaurateur
• Robert Millar (disambiguation)
• Robin Millar (born 1951), English musician, songwriter, and record producer
• Rodrigo Millar (born 1981), Chilean footballer
• Ron Millar, video game designer
• Ryan Millar (born 1978), American volleyball player
• Sandy Millar (born 1939), English Anglican bishop
• Syd Millar (1934–2023), chairman of the International Rugby Board
• Thomas Millar (1925–1994), Australian historian and political scientist
• Willie Millar (1901–1966), Scottish professional footballer
• William Millar (disambiguation), several people

• Alex Millar (Being Human), a lead character in the British television series Being Human
• Kirsty Millar, from the British soap opera Doctors
• Martin Millar (Doctors), from the soap opera Doctors
• Ollie Millar, from the soap opera Doctors
• Rich Millar, from the soap opera Doctors

• Millar Addition, suburb of Prince George, British Columbia, Canada
• Mount Millar Wind Farm
• Miller (disambiguation)
  • Miller (name)
    • List of people with surname Miller