| Bill Hay | |
| Full Name: | William Douglas Hay |
| Nationality: | Singaporean |
| Birth Date: | 7 October 1934 |
| Sport: | Field hockey |
| Club: | Singapore Recreation Club, Singapore |
William Douglas "Bill" Hay (born 7 October 1934) is a Singaporean field hockey player. He competed in the men's tournament at the 1956 Summer Olympics.[1]