Harry Essex (1910-1997) was an American screenwriter who also had a few credits as a director.
His early writing career involved working for several New York City newspapers, as well as contributing short stories to Collier's and The Saturday Evening Post. His writing aspirations were put on hold when he was drafted into the U.S. Army Signal Corps during World War II. Shortly after his discharge, an old acquaintance who was working at Columbia Pictures hired him on as a screenwriter. However, it was at Universal Studios where his two most renowned screenplays (It Came from Outer Space and Creature from the Black Lagoon) were shot.