Sir Reginald Mohun, 1st Baronet (1564–1639) of Boconnoc in Cornwall, was a prominent member of the gentry of Cornwall.
He was the eldest son and heir of Sir William Mohun (d.1587) of Boconnoc, Sheriff of Cornwall in 1572, by his first wife Elizabeth Horsey, daughter and heiress of John Horsey. He was descended from the ancient Mohun family, feudal barons of Dunster in Somerset, seated at Dunster Castle.
He was created a baronet on 25 November 1612.
He married thrice:
He died on 26 December 1639 and his will was proved on 30 April 1640.