Sir James Long, 2nd Baronet (c. 1617 – 22 January 1692) was an English politician and Royalist soldier.
Born at South Wraxall, Bradford-on-Avon, Wiltshire, the son of Sir Walter Long and Anne Ley (daughter of James Ley, 1st Earl of Marlborough), he was educated at Magdalen College, Oxford, and admitted to Lincoln's Inn in 1634. At his father's death in 1637, Long inherited the bulk of his Wiltshire estates, including the manor of Draycot Cerne.