Admiral Philip Cavendish (died 1743) of Westbury, Hampshire, was a Royal Navy officer and politician who sat in the House of Commons between 1721 and 1743.

Cavendish was put forward to succeed his father-in-law, Edward Carteret, as Member of Parliament for Bere Alston on the Hobart interest.

He was returned unopposed as MP for St. Germans on the Government interest at the 1722 general election.

He did not obtain a seat at the 1727 general election although his father-in-law tried to put him forward for Harwich.

[2] At the 1734 election, Cavendish was returned unopposed with Sir Charles Wager as MP for Portsmouth on the Admiralty interest.