| William Aguirre | |
| Full Name: | William Duilio Aguirre Villaviconcio |
| Nationality: | Nicaraguan |
| Sport: | Long-distance running |
| Event: | Marathon |
| Birth Date: | 27 December 1962 |
| Height: | 1.73 m |
| Weight: | 65 kg |
William Duilio Aguirre Villaviconcio (born 27 December 1962) is a Nicaraguan long-distance runner. He competed in the men's marathon at the 1992 Summer Olympics and the 1996 Summer Olympics.[1]