MacCallum Grant (May 17, 1845 – February 23, 1928) was a Canadian businessman and the 12th Lieutenant Governor of Nova Scotia.Born at Loyal Hill (in the area of Summerville) in Hants County, Nova Scotia, the son of John Nutting and Margaret (MacCallum) Grant, Grant was educated in Newport, Nova Scotia. He commenced his business career with S. A. White & Co, in 1873. He was a member of the firm Black Bros. Co. from 1875 to 1893. He then formed the firm Grant, Oxley & Company.