Samuel Joseph Mackie FGS, FSA (21 January 1823 – 31 May 1902), was a British geologist, inventor, and editor.
He was a founding member of the Geologists' Association and the Anthropological Society of London, and sole editor of The Geologist: a Popular Monthly Magazine of Geology, a precursor to the Geological Magazine.
Born in Dover to Samuel and Eleanor Mackie, he married Maria Kemp on 4 December 1845, and after her death married Susan Arabella in October, 1853.
He edited The Geologist from 1858 to 1864, at which point it was acquired by Lovell Reeve & Co.
The next year he established the Geological and Natural History Repertory, which folded in 1869.