Philip "Phil" Monroe (October 31, 1916 – July 13, 1988) was an American animator and director best known for working for Warner Bros. Cartoons under the supervision of Chuck Jones. Monroe has also worked for UPA, DePatie-Freleng, and MGM Animation/Visual Arts.
Monroe started working at Leon Schlesinger Productions (the company later known as Warner Bros. Cartoons) in June 1934. He was initially only an inbetweener. The studio at this point was loosely-enough organized to allow opportunities of rapid advancement for ambitious young inbetweeners, like Monroe. According to a later interview with Monroe, "some guys" were content to be "inbetweeners all their lives", while others searched for opportunities to do something else and move up in the studio's hierarchy. Monroe himself managed to befriend animator Robert McKimson and served as his inbetweener for a while. He was soon promoted to become McKimson's assistant. By the end of 1935, Monroe had been promoted again and started serving as an animator in his own right. 
Monroe was one of Jones' favorite animators, along with Ken Harris, Ben Washam and Abe Levitow. In 1951, Monroe left for UPA, working under the supervision of John Hubley and Pete Burness. He eventually left UPA to freelance, and in 1959 went back to Warners to head their commercial department, where he directed commercials featuring Charlie the Tuna. He eventually went back into the entertainment department as an animator in Jones' unit, and was chosen to finish two shorts (The Iceman Ducketh, Woolen Under Where) under Chuck Jones' unit after Jones was fired. After Warner Bros. Cartoons closed in 1963, Monroe did many animation stints until he ended up at Chuck Jones Productions. He would continue animating for Jones until his retirement.
- Barrier (2003), Warner Bros., pp. unnumbered pages
- Barrier, Michael (2003), "Warner Bros., 1933-1940", Hollywood Cartoons: American Animation in Its Golden Age, Oxford University Press, ISBN 978-0199839223