| Birth Place: | Forni di Sopra, Udine, Italy |
| Death Place: | Antioch, California, U.S. |
| University: | Santa Clara University |
| Repyears1: | 1924 |
Caesar J. Mannelli (July 8, 1897 - May 3, 1936) was an American rugby union player who competed in the 1924 Summer Olympics. He was a member of the American rugby union team, which won the gold medal.[1]
He attended Santa Clara University.[2]