Michel Chamillart or Chamillard was a French statesman, a minister of King Louis XIV of France.

The Secretary of State for War, later Secretary of State, Minister for War, was one of the four or five specialized secretaries of state in France during the Ancien Régime. The position was responsible for the Army, for the Marshalcy and for overseeing French border provinces. In 1791, during the French Revolution, the Secretary of State for War became titled Minister of War.