Philip Rashleigh FRS FSA (28 December 1729 – 26 June 1811) of Menabilly, Cornwall, was an antiquary and Fellow of the Royal Society and a Cornish squire.

[4] A portrait of Rashleigh, seated in a chair, was painted by John Opie about 1795, and is now in the Royal Cornwall Museum, Truro.

In the same collection are models in glass of the hailstones that fell on 20 October 1791, particulars of which, with the figured representations, are given, on Rashleigh's information, in King's Remarks on Stones fallen from the Clouds, pp. 18–20.

[10] Rashleigh was a regular correspondant with John Hawkins, patron of Martin Heinrich Klaproth, and William Gregor, discoverer of Titanium.

They bought and sold minerals, patronised leading chemists and introduced european geological theories into the British Isles.

They had no issue, and the family estates passed to his nephew William Rashleigh (1777–1855), MP for Fowey (1812–18) and Sheriff of Cornwall for 1820.