Laing (/læŋ, leɪŋ/) is a Scottish surname, commonly found in countries settled by Scots, such as Canada and New Zealand. It is often wrongly described as a descriptive surname, cognate with the English surname [Long (Scots lang) but this is a mispronunciation of the name, which is pronounced layng. The name emanates from Normandy.

Notable people with the surname include:

• Alex Laing (footballer), New Zealand footballer
• Alexander Laing (architect), Scottish architect
• Alexander Gordon Laing (1794–1826), Scottish explorer
• Andrew Laing (born 1966), New Zealand actor
• Annie Rose Laing (1869–1946), Scottish artist
• Arthur Laing (1904–1975), Canadian politician
• Bert Laing, New Zealand rugby league footballer
• Billy Laing (born 1951), Scottish footballer
• Bobby Laing (1925–1985), Scottish footballer
• Bonnie Laing (1937–2016), Canadian politician
• Brent Laing (born 1978), Canadian curler
• Catriona Laing, British ambassador
• Corky Laing (Laurence Gordon Laing, born 1948), Canadian musician
• C. J. Laing (born 1956), American pornographic actress
• Shanae laing (born 2008),
• Dan Laing, American sports commentator
• Dave Laing (1947–2019), English music journalist
• David Laing (architect) (1774–1856), British architect of the New Custom House, London
• David Laing (antiquary) (1793–1878), Scottish antiquary
• Davie Laing (1925–2017), Scottish footballer
• Dilys Laing (1906–1960), Welsh-American poet
• Duncan Laing (1933–2008), New Zealand swimming coach
• Ebenezer Laing (1931–2015), Ghanaian botanist and geneticist
• Eleanor Laing (born 1958), British politician
• Gerald Laing (1936–2011), Scottish artist
• Gordon Laing (musician) (born 1964), British classical bassoonist
• Gordon Jennings Laing (1869–1945), Canadian-American academic
• Hector Laing, Baron Laing of Dunphail (1923–2010), British businessman
• Hugh Laing (1911–1988), British ballet dancer
• Ivan Laing (1885–1917), Scottish hockey player
• James Laing (doctor) (c. 1749–1831), Scottish medical man and plantation owner in Dominica
• James Laing (born 1982), British entrepreneur
• Jamie Laing (born 1988), English television personality
• John Laing (disambiguation), several people
• Kerri Laing (born 1968), South African cricketer
• Kirby Laing (1916–2009), English businessman
• Kirkland Laing (1954–2021), Jamaican-English boxer
• Kojo Laing (1946–2017), Ghanaian novelist and poet
• Lavinia Malcolm née Laing (c. 1847–1920), Scottish suffragist, politician, first Scottish woman female councillor and first female Lord Provost
• Leslie Laing (1925–2021), Jamaican athlete
• Malcolm Laing (1762–1818), Scottish historian
• Marie Laing (1937–2023), Canadian politician
• Martin Laing (born 1942), English businessman
• Martin Laing (production designer), British film production designer
• Maureen Laing (1920–2013), American journalist and author
• Maurice Laing (1918–2008), English businessman
• Michael Laing, South African chemist
• Quintin Laing (born 1979), Canadian ice hockey player
• Robbie Laing (born 1958), American basketball coach
• Robert W. Laing, British film art director
• Ronald David Laing (1927–1989), Scottish psychiatrist
• Roy Laing (1893–1972), Australian rules footballer
• Samuel Laing (travel writer) (1780–1868), author of books on Scandinavia and Germany
• Samuel Laing (science writer) (1812–1897), British railway administrator, politician, and writer on science and religion
• Sandra Laing (born 1955), South African apartheid cause célèbre
• Shona Laing (born 1955), New Zealand musician
• Stuart Laing (diplomat) (born 1948), British diplomat
• Stuart Laing (actor) (born 1969), British actor
• Tony Laing (boxer) (born 1957), Jamaican-British boxer
• William Laing (disambiguation), several people