Samuel Jacob Jackson (February 18, 1848 – May 29, 1942) was a Canadian politician.Born in Stradbally, Queen's County, Ireland, the son of Samuel Jackson and Elizabeth Sutcliffe, Jackson was educated at Brantford, Ontario. He came west to Manitoba in 1871. Jackson later became a partner in a mercantile firm in Winnipeg. In 1878, he married Ida Isabella Clark.