de Lancie is a surname. Notable people with the name include:
John de Lancie, character actor best known for his role as recurring guest star Q on the various Star Trek series John de Lancie (oboist), the principal oboist of the Philadelphia Orchestra for many years Keegan de Lancie, American actor and son of actor John de Lancie and Marnie Mosiman
See also Lancié, French commune Delancey (surname)