| Arnaldo Abrantes | |
| Full Name: | Arnaldo Joaquim Castro Abrantes |
| Nationality: | Portuguese |
| Sport: | Sprinting |
| Event: | 4 × 100 metres relay |
| Birth Date: | 18 December 1961 |
| Birth Place: | Águeda, Portugal |
Arnaldo Joaquim Castro Abrantes (born 18 December 1961) is a Portuguese sprinter. He competed in the men's 4 × 100 metres relay at the 1988 Summer Olympics.[1]