Frank Tidy (17 May 1932 - 27 January 2017) was an English cinematographer.
Born in Liverpool, Tidy initially worked in stop motion animation before beginning working as a cinematographer. Along with Roger Woodburn and Peter Biziou, he founded the company Valley Films, and would work on hundreds of commercials, many of which directed by eventual film director Ridley Scott and his brother Tony Scott. In 1977, he would serve as cinematographer on Scott's directorial debut The Duellists. Tidy's work earned him a BAFTA nomination.