Lloyd Henry "Bummy" Bumstead (March 17, 1915 – May 24, 2006) was an American cinematic art director and production designer. In a career that spanned nearly 70 years, Bumstead began as a draftsman in RKO Pictures' art department and later served as an art director or production designer on more than 90 feature films. He won Academy Awards for Best Art Direction for To Kill a Mockingbird (1962) and The Sting (1973). He was also nominated for Academy Awards for his work on Vertigo (1958) and Unforgiven (1992).

After attending the University of Southern California, he began working at RKO Pictures in 1937. His career was interrupted by military service during World War II. He worked at Paramount Pictures in the 1940s and 1950s and at Universal Studios in the 1960s and 1970s. He collaborated with George Roy Hill and Clint Eastwood on multiple films. His final work, at age 91, was on Eastwood's Flags of Our Fathers (2006).