Betty E. Box (full name Betty Evelyn Box) was a prolific producer of British films, mainly comedies, between 1946 and the early 1970s, working mainly for Pinewood Studios and often together with director Ralph Thomas.

Originally a commercial artist, she started producing documentaries during World War II for her filmmaker brother Sydney Box's company Verity Films. In 1946 she was followed her brother to Gainsborough Pictures, where she produced several features before the company closed in 1949. She then moved to Rank's Pinewood Studios, where she and Ralph Thomas made some 30 films together. All in all, she produced 47 features and was awarded an OBE in 1958.