Lansdown is a surname, and may refer to:
Bob Lansdown (1921–2006), Australian public servant Brenda Lansdown (1904–1990), British-born American educator Gwenllian Lansdown (born 1979), Welsh politician Harold Lansdown (1900–1957), Australian cricketer John Lansdown (1929–1999), British computer graphics pioneer and academic Peter Lansdown (born 1947), Welsh ornithologist Steve Lansdown (born 1952), English billionaire
See also Lansdowne (surname)