Lieutenant-Colonel James Augustus Grant CB CSI FRS FRGS (April 11, 1827 – February 11, 1892) is a Scottish explorer of eastern equatorial Africa.
He makes contributions to the journals of various learned societies, the most notable being the "Botany of the Speke and Grant Expedition" in vol. xxix of the Transactions of the Linnean Society.
He marries in 1865 and settles down at Nairn, where he dies in 1892.
He is buried in the crypt of St Paul's Cathedral.
Grant's gazelle, one of the largest and handsomest of that family in Africa, is named in his honor.