| Décio de Azevedo | |
| Fullname: | Décio Viotti de Azevedo |
| Nationalyears: | 1959–1968 |
| Teamnumber: | 9 |
| Birth Date: | 12 October 1939 |
| Birth Place: | Belo Horizonte, Minas Gerais, Brazil |
| Height: | 1.84 m |
| Medaltemplates-Title: | Medal record |
Décio Viotti de Azevedo (born 12 October 1939) is a Brazilian former volleyball player who competed in the 1964 Summer Olympics in Tokyo and the 1968 Summer Olympics in Mexico City. He played on the teams that won the gold medal at the 1963 Pan American Games and silver medals at the 1959 and 1967 Pan American Games. He was born in Belo Horizonte, Minas Gerais, Brazil.[1]