Henry Snowden Valk (January 26, 1929 – April 12, 2022) was an American physicist and academic. He was Professor Emeritus of Physics at the Georgia Institute of Technology. Valk attended George Washington University where he received his B.S. in physics in 1953 and M.S. in mathematics in 1954. He then earned his Ph.D. at Washington University in St. Louis in 1957. Before joining the faculty at the Georgia Institute of Technology, Valk was a professor of physics at the University of Nebraska.