Marchildon is a surname. Notable people with the surname include:
Ananda Marchildon (born 1986), Canadian-Dutch fashion model Daniel Marchildon, Canadian writer Emile Marchildon (1888–1967), Canadian ice hockey player Gilles Marchildon (born 1965), Canadian activist Leo Marchildon (born 1962), Canadian composer Phil Marchildon (1913–1997), Canadian baseball player Thomas Marchildon (1805–1858), Canadian businessman, farmer and politician