Julius Frank "Hans" Wagner (May 1, 1905 – August 29, 1960) was an American college football and wrestling coach.
Wagner was an outstanding player on the 1925 Colorado Agricultural football team of Harry W. Hughes.
Wagner assisted Hughes from 1927 to 1941 in football, coaching the linemen and helping the Aggies win three conference championships, in 1927, 1933 and 1934.
Following the resignation of Hughes in April 1942 as head football coach, Wagner took over the program, but his tenure was interrupted by the World War II.
When Bob Davis took over as head football coach in 1947, Wagner continued as the head coach of freshman football team from 1947 to 1955, resigning his position in 1956 to become the director of new construction on the campus that became Colorado State University.