Harry Joseph Jacoby (September 2, 1910 – November 9, 1993) was an American football and basketball coach and athletics administrator.

His first tenure lasted from 1938 through the first four games of 1941, when he was called by the United States Army for active duty at Fort Warren, Wyoming.

The final three games in 1941 were coached by George "Stub" Allison, who also took over athletic director duties.

[1][2] After World War II ended, Jacoby resumed coaching duties for the Broncos in 1946.

Jacoby was also the head basketball coach at Boise Junior College for two seasons, from 1939–40 to 1940–41, tallying a mark of 24–21.