Robert E. Brannan (November 12, 1891 – August 6, 1958) was an American football, basketball, and baseball player and coach. He was the first coach in Chicago Bears franchise history, running the team when they were known as the Decatur Staleys in 1919.

Brannan was hired as athletic coach at Sioux Falls College—now known as the University of Sioux Falls in 1915.^[1]

In 1920, Brannan became the ninth head football coach at Ottawa University in Ottawa, Kansas, a position he held for three seasons until 1922. His coaching record at Ottawa was 4–19–1.^[2] According to football legend Walter Camp, the only bright spot for the team in the 1922 season was a guard named Swineheart who "played consistently" for the season.^[3] Brannan graduated from the Ottawa academy in 1911. He later graduated from Ottawa University in 1915, having earned fourteen letters in all university sports. Prior to coaching at Ottawa, he had coached at Sioux Falls, James Millikin University, and high schools near Decatur, Illinois.^[4]

After coaching, Brannan worked for what later became Union Carbide, Co. until he retired in 1956. He died at a hospital at New York City in 1958.^[5]