| William Foster | |
| Fullname: | William Foster |
| National Team: | Great Britain |
| Strokes: | Freestyle |
| Club: | Bacup Amateur Swimming Club |
| Birth Date: | 10 July 1890 |
| Birth Place: | Haslingden, England |
| Death Place: | Fylde, England |
William Foster (10 July 1890 – 17 December 1963) was an English competitive swimmer who represented Great Britain in the 1908 and 1912 Olympics. He was freestyle swimmer who won gold and bronze medals as a member of British relay teams and set a world record in the 4x200-metre freestyle relay.[1]
At the 1908 Summer Olympics in London, he won the gold medal as part of the British 4×200-metre freestyle relay team and did not compete in any other competition. In the 400-metre freestyle final, he finished fourth, and in the 1500-metre freestyle event he was eliminated in the semi-finals.
Four years later, at the 1912 Summer Olympics in Stockholm, he won the bronze medal as part of the British 4×200-metre freestyle relay team. In the 400-metre freestyle competition as well as in the 1500-metre freestyle event, he was eliminated in the semi-finals.