Birch Evans Bayh Sr. (September 29, 1893 – August 26, 1971) was an American basketball and baseball coach. He was the head basketball coach at Indiana State University from 1918 to 1923. During this time, he also served as the head baseball coach, athletic director and professor of physical education. He was also instrumental in the establishment of the Indiana Intercollegiate Conference; additionally, he served as the first secretary-treasurer of that organization.