Lascelles (pronounced Lassels) is a surname or first name. Notable people with the surname include:
Alan Lascelles (1887–1981) "Tommy" Lascelles was Private Secretary to both King George VI and Queen Elizabeth II
Daniel Lascelles (1655–1734), English landowner and politician of Stank and Northallerton, North Riding, Yorkshire
Daniel Lascelles (1714–1784), English landowner, merchant and British politician of Goldsborough Hall
Daniel Lascelles (1902–1967), British ambassador to Japan
David Lascelles, Viscount Lascelles (born 1950)
Edward Lascelles, 1st Earl of Harewood (1740–1820), British peer and politician
Edwin Lascelles, 1st Baron Harewood (1713–1795), British landowner and politician, built Harewood House
Edwin Lascelles (1799–1865), barrister and MP for Ripon from 1846 to 1857
Francis Lascelles (1612–1667), Member of English Parliament and New Model Army officer of Stank Hall
Francis William Lascelles (1890–1979), Clerk of the Parliaments 1953-1959
Frank Lascelles (diplomat) (1841–1920), British diplomat, ambassador to Germany and to Russia
Frank Lascelles (pageant master) (1875–1934), British pageant master
Gerald Lascelles (disambiguation), multiple people
Henry Lascelles (1690–1753), English merchant, landowner and politician of Harewood, Yorkshire
Henry Lascelles, 2nd Earl of Harewood (1767–1841), British peer and politician
Henry Lascelles, 3rd Earl of Harewood (1797–1857), British peer and politician
Henry Lascelles, 4th Earl of Harewood (1824–1892), British peer
Henry Lascelles, 5th Earl of Harewood (1846–1929), British peer
Henry Lascelles, 6th Earl of Harewood (1882–1947), British peer
Jamaal Lascelles (born 1993), English footballer
James Lascelles (born 1953), British musician and son of the 7th Earl of Harewood
Margaret Lascelles, Viscountess Lascelles (born 1948), the former wife of David Lascelles, Viscount Lascelles
Thomas Lascelles (1624–1697), Member of English Parliament and New Model Army officer
William Lascelles (1798–1851), British politician and son of Henry Lascelles, 2nd Earl of Harewood
