Philip John Waller (born 1946) is an English historian and emeritus fellow of Merton College, University of Oxford.

[1] He enjoyed a long career at Merton College, Oxford, where he was Tutor in Modern History from 1971 to 2008.

[2] He has published many essays and articles in a variety of academic journals, magazines and symposia, and in 2003 he served as editor of The English Historical Review.

[1][2] While at Merton, Waller led history reading parties in Cornwall, a tradition begun by his predecessor Roger Highfield in 1953.

Even in retirement Waller continued to invite undergraduate historians to visit his home on Bodmin Moor.