The 12th Academy Awards ceremony, held on February 29, 1940 by the Academy of Motion Picture Arts and Sciences (AMPAS), honored the best in film for 1939 at a banquet in the Coconut Grove at The Ambassador Hotel in Los Angeles. It was hosted by Bob Hope, in his first of nineteen turns as host.

The Ambassador Hotel was a hotel in Los Angeles, California. Designed by architect Myron Hunt, the Ambassador Hotel formally opened to the public on January 1, 1921. Later renovations by architect Paul Williams were made to the hotel in the late 1940s. It was also home to the Cocoanut Grove nightclub, a premier Los Angeles night spot for decades; host to six Oscar ceremonies and to every United States President from Herbert Hoover to Richard Nixon.