| William Mordeno | |
| Nationality: | Filipino |
| Sport: | Athletics |
| Event: | 4 × 100 metres relay, 100 metres sprint |
| Death Date: | (aged 74) |
| Death Place: | Butuan, Philippines |
| Show-Medals: | yes |
William Mordeno (1947/1948 – January 30, 2022) was a Filipino sprinter.
One of the top-sprinters in the Philippines in the 1960s, he competed at the 1966 Asian Games where he won a bronze in the men's 4 × 100 metres relay with Rogelio Onofre, Remegio Vista, and Arnulfo Valles[1] under coach Ruperto Evangelista. He is also known for competing in the 100 metre sprint, ranking behind Onofre and Valles at his peak.[2]
He retired in the 1970s, to work as a provincial sports regulation officer in Agusan del Sur until 2010. He was among the casualties of the COVID-19 pandemic, dying on January 30, 2022, in Butuan of complications from COVID-19 at age 74.[2]