William Campbell Eubank (born November 15, 1982) is an American director, screenwriter, and cinematographer. He made his feature directorial debut with the sci-fi drama "Love" (2011), and went on to direct the sci-fi mystery "The Signal" (2014), the disaster thriller "Underwater" (2020), the supernatural horror "Paranormal Activity: Next of Kin" (2021), and the military action adventure "Land of Bad" (2024).

Like filmmakers Steven Spielberg and David Lynch, Eubank is an Eagle Scout. When Eubank was young, he had an interesting experience with the verisimilitude of cinema. At the time that he first watched the 1974 film "Chinatown," set in the year 1937, Eubank was unaware that it was a period piece, assuming it to have been made contemporaneously in 1937. When he found out it had been made almost four decades after the era it depicted, Eubank came to a realization about film's power.