Julius A. Penn (February 19, 1865 - May 13, 1934) was a career officer in the United States Army. He attained the rank of brigadier general during World War I, and commanded 170th Infantry Brigade, 85th Division and 76th Infantry Brigade, 38th Division, in addition to serving as Chief of the Personnel Bureau for the American Expeditionary Forces. A lifelong bachelor, in retirement, Penn resided with his sister in Batavia. He died in Batavia on May 13, 1934 and was buried at Batavia Union Cemetery.