Pieter Hendrik van Cittert (30 May 1889, Gouda – 8 October 1959, Utrecht) was a Dutch physicist and science historian. He was born in Gouda, Netherlands, to Benjamin Pieter van Cittert and Petronella Antonia Huber, and died on October 8, 1959, in Utrecht. His achievements include proving the van Cittert–Zernike theorem about the coherence of radiation and founding the University Museum in Utrecht.