Ernest Mark Henley (June 10, 1924 – March 27, 2017[1]) was an American atomic and nuclear physicist.

From 1944 to 1946, he served in the U.S. Navy, decommissioning and repairing electrical equipment on ships and submarines.

In 1954, Henley accepted a faculty position at the University of Washington where he remained for his entire career, serving as Dean of the College of Arts and Sciences between 1979 and 1987.

[3] In 1976 Henley calculated with Lawrence Wilets the effects on parity non-conservation in atomic physics,[4] and later he calculated parity violating effects in the parton model with Stephen Ellis and David Callaway[5][6] From 1979 to 1987 he was Dean of the College of Arts and Sciences there and Director of the Institute for Theoretical Nuclear Physics in 1990-1991.

[7] He dedicated his retirement to teaching Physics at the University of Washington's Transition School and Early Entrance Program, the Robinson Center for Young Scholars.