John Lawson Senior (March 31, 1879 in Montgomery, New York – 1946[1][2][3]) was a sports administrator and the founder of Slope Day at Cornell University.
Senior graduated from Cornell University in 1901 and was a member of the Sphinx Head Society.
[5] Senior also became the first graduate manager of the Cornell University Glee Club.
His wife endowed the John L. Senior Professor of American Institutions at Cornell University, which has been held (in order) by Dexter Perkins, Clinton Rossiter, Theodore Lowi, and currently by Suzanne Mettler.
His wife also endowed the fourth floor study rooms in Olin Library, named in honor of John L. Senior.