Sir Peter Proby, 2nd Baronet, KStJ DL (4 December 1911 – 18 April 2002) was an English landowner and bursar of Eton.
The eldest son of Sir Richard Proby and Betty Monica Murray.
He enlisted in the Irish Guards upon the outbreak of World War II, spending most of his career in military intelligence interpreting aerial photographs and interrogating captured German airmen.
During his tenure there, several new buildings were erected, including Villiers and Farrer houses, and the college chapel was renovated after an infestation of death watch beetle.
Proby was noted for his skilled financial management of these projects, and for his enthusiasm for new technology.