| Bill Cowan | |
| Fullname: | William Cowan |
| Birth Date: | 28 April 1959 |
| Birth Place: | Toronto, Ontario, Canada |
| Plays: | Right-handed |
| Singlesrecord: | 1–8 |
| Highestsinglesranking: | No. 207 (8 December 1986) |
| Australianopenresult: | Q2 (1980) |
| Wimbledonresult: | Q1 (1986, 1987) |
| Usopenresult: | 1R (1981) |
| Doublesrecord: | 2–10 |
| Highestdoublesranking: | No. 225 (1 October 1984) |
William Cowan (born 28 April 1959) is a Canadian former professional tennis player.[1]
Cowan, a Toronto native, featured in the singles main draw at the 1981 US Open.[2]
Between 1982 and 1984, Cowan competed in four Davis Cup ties for Canada. He won his only singles rubber, over Venezuela's Abraham Sojo, but was less successful in doubles, losing all four rubbers.