Blue Monday Jamboree is an old-time radio variety program in the United States. It was broadcast initially (beginning January 24, 1927) on KFRC in San Francisco, California, then was distributed on the West Coast by the Don Lee Network and was later carried nationwide on CBS. Bill Oates wrote, in his biography of Meredith Willson, that the program was "one of the most popular West Coast originated radio shows in the early 1930s."