Gillis Smak Gregoor (1770 – 1843), was a Dutch landscape painter.

He was born in Dordrecht, South Holland and was a pupil of Abraham and Jacob van Strij.[1] He is known for landscapes with animals and was a member of the Pictura painter's collective in Dordrecht. His pupil was Matthijs Quispel.[1] He died in Dordrecht.
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