| 1848-1867 |
Four principals of the Allentown Seminary, President of the Allentown Collegiate and Military Institute and a President of the Allentown Collegiate Institute. |
| 1867-1876 |
Frederick Augustus Muhlenberg |
| 1877-1885 |
J.P. Benjamin Sadtler |
| 1886-1903 |
Theodore Lorenzo Seip |
| 1903-1904 |
William Wackernagel (acting) |
| 1904-1936 |
John A.W. Haas |
| 1936-1937 |
Robert C. Horn (acting) |
| 1937-1951 |
Levering Tyson |
| 1951-1952 |
Quintity (five-man acting committee) |
| 1952-1953 |
Morris S. Greth (acting) |
| 1953-1961 |
J. Conrad Seegers |
| 1961-1969 |
Erling N. Jensen |
| 1969-1984 |
John H. Morey |
| 1984-1992 |
Jonathan C. Messerli |
| 1992-2002 |
Arthur R. Taylor |
| 2002-2003 |
James B. Steffy (acting) |
| 2003- |
Peyton Randolph Helm |
