George Palmer Williams
1841-1881
Karl E. Guthe
(Director of the Physical Laboratory)
1911-1915
Harrison M. Randall
1915-1941
Ernest F. Barker
1941-1955
David Dennison
1955-1965
H. Richard Crane
1965-1972
Daniel Sinclair
1972-1977
Richard H. Sands
1977-1982
Lawrence W. Jones
1982-1987
Homer A. Neal
1987-1992
John F. Ward
1992-1994 (Interim)
Citrad Uher
1994-2004
Myron Campbell
2004-2009
Bradford G. Orr
2009-
