Mark Harrington may refer to:
Mark Harrington (HIV/AIDS activist) (born 1959 or 1960), American AIDS activist Mark Harrington (anti-abortion activist), American anti-abortion activist Mark Raymond Harrington (1882–1971), American archeologist Mark Harrington (painter) (born 1952), American-born Europe-based painter Mark Walrod Harrington (1848–1926), American meteorologist