Andrzej Sołtan (25 October 1897 – 10 December 1959) was a Polish nuclear physicist. He also worked on spectroscopy in the band between far ultraviolet and X-rays. During his visit to Caltech in 1932–33, together with H. Richard Crane and Charles Christian Lauritsen, he discovered a method for producing neutron beams, by bombarding lithium or beryllium nuclei with accelerated deuterons.