Jan Claesz Rietschoof was a Dutch Golden Age painter of seascapes.

According to Houbraken he learned painting first from Abraham Liedts, and later from the renowned seascape painter Ludolf Bakhuizen.

His paintings today hang in various museums in the Netherlands. He taught his son Hendrik Rietschoof (1678–1747) how to paint; Hendrik's seascape and seaport drawings are online at the Amsterdam archives. In Hoorn he was a contemporary of the flower painter Jacob Rootius, who was the son of the influential schutterstuk painter Jan Albertsz Rotius.