John Cameron of Lochiel (died 1748) was the 18th chief of Clan Cameron and a significant Jacobite. He was the eldest son and heir of Sir Ewen Cameron of Lochiel, a fervent Royalist and one of the first to join the rising of 1652 in favour of King Charles II, by whom he was knighted in 1681.
He joined the Earl of Mar in 1715 at the head of his Clan. On January 27, 1717, he was created by "King James VIII", otherwise known as the "Old Pretender" or "Old Chevalier", a Lord and Peer of Parliament in the Jacobite Peerage, under the title of Lord Lochiel. He fought at the Battle of Glen Shiel in 1719, and died in exile in Flanders.
His eldest son and successor was Donald Cameron of Lochiel, known as "Gentle Lochiel", who played an important role in the Jacobite Rising of 1745.