Sir John Borlase Warren, 1st Baronet (2 September 1753 – 27 February 1822), was an English admiral, politician and diplomat. Born in Stapleford, Nottinghamshire, he was the son and heir of John Borlase Warren (died 1763) of Stapleford and Little Marlow. He entered Emmanuel College, Cambridge in 1769, but in 1771 entered the Royal Navy as an able seaman; in 1774 he became member of Parliament for Great Marlow; and in 1775 he was created a baronet, the baronetcy held by his ancestors, the Borlases, having become extinct in 1689.