thumb|right|Mountainous Landscape in Italy
Willem (or Guilliam) de Heusch (c. 16259 March 1692 (buried)) was a Dutch landscape painter and engraver.
Life
Very little is known about de Heusch's life and training. De Heusch was born and died in Utrecht. He likely studied with Jan Both as he later painted entirely in Both's style.
One pupil of de Heusch in Utrecht was his nephew, Jacob de Heusch.
Work
thumb|Italian River Landscape with Stone Bridge
His pictures are signed with the full name, beginning with a monogram combining a G (for Guilliam or Guglielmo), D and H Heusch's etchings, of which thirteen are known, are also in the character of those of Both.