| Sport: | Water polo |
| Birth Date: | 23 July 1925 |
| Birth Place: | Venice, Italy |
| Death Place: | Venice, Italy |
Cosimo "Nino" Antonelli (23 July 1925 - 14 January 2014) was an Italian water polo player who competed in the 1956 Summer Olympics. He was born in Venice.[1] In 1956 he was a member of the Italian team which finished fourth in the Olympic tournament. He played one match as goalkeeper.