Chase Jay Nielsen (January 14, 1917 – March 23, 2007) was a career officer in the U.S. Air Force. He participated in the Doolittle Raid in 1942 and was one of the four surviving prisoners of war from that raid. Nielsen was a member of the Church of Jesus Christ of Latter-day Saints. Born in Hyrum, Utah, Nielsen attended Utah State University and graduated in 1939 with a bachelor of science degree in civil engineering. In August 1939, he enlisted in the U.S. Army Air Corps as a flying cadet. He was commissioned as a second lieutenant in June 1941.