| Diogo Costa | |
| Full Name: | Diogo Eurico Vaz de Bacelar da Fonseca e Costa |
| Birth Date: | 23 August 1997 |
| Birth Place: | Porto, Portugal |
| Height: | 1.74 m |
| Sport: | Sailing |
| Mother: | Maria Cecília de Sousa Carneiro Vaz de Bacelar |
| Father: | Fernando Luís Lopes da Fonseca e Costa |
Diogo Eurico Vaz de Bacelar da Fonseca e Costa (born 23 August 1997) is a Portuguese sailor. He competed in the 2020 Summer Olympics.[1]
Costa placed second in the 2021 470 World Championships with Pedro Costa, qualifying the pair for the 2020 Olympics.[2] He and Carolina João won a place to compete in the 2024 Olympics as did the ILCA 7 sailor Eduardo Marques and the kitefoiler Mafalda Pires de Lima.[3]