Bower Slack Broaddus (May 30, 1888 – December 10, 1949) was a United States federal judge.
Born in Chillicothe, Missouri, Broaddus received an LL.B. from Kansas City School of Law in 1910. He was in private practice in Muskogee, Oklahoma from 1910 to 1940. He was a police judge in Muskogee from 1912 to 1914, and was a city attorney of Muskogee from 1926 to 1930. He was a member of the Oklahoma House of Representatives from 1933 to 1935, and of the Oklahoma State Senate from 1935 to 1938.
On September 24, 1940, Broaddus was nominated by President Franklin D. Roosevelt to a jointly held seat on the United States District Court for the Western District of Oklahoma, United States District Court for the Northern District of Oklahoma, and United States District Court for the Eastern District of Oklahoma, vacated by Alfred P. Murrah. Broaddus was confirmed by the United States Senate on September 27, 1940, and received his commission on October 1, 1940. Broaddus served in that capacity until his death, in 1949.