| Diamantino dos Santos | |
| Full Name: | Diamantino Silveira dos Santos |
| Sport: | Long-distance running |
| Event: | Marathon |
| Birth Date: | 3 February 1961 |
| Birth Place: | Carazinho, Rio Grande do Sul, Brazil |
| Height: | 1.66 m |
| Weight: | 59 kg |
Diamantino Silveira dos Santos (born 3 February 1961) is a Brazilian long-distance runner. He competed in the men's marathon at the 1988, 1992 and the 1996 Summer Olympics.[1]