Petrus Johannes van Regemorter (8 September 1755 – 17 November 1830) was a Flemish landscape and genre painter, born in Antwerp.
He was a pupil of the Royal Academy of Fine Arts, but frequently studied pictures from private collections.
Many artists of note studied under him, and he had a large practice as a picture-restorer.
In 1814 he was engaged in bringing back the pictures taken by the French to Paris.
His son, also his pupil, was the painter Ignatius Josephus van Regemorter.