| Position: | Defence |
| Shoots: | Left |
| Height Ft: | 6 |
| Height In: | 3 |
| Weight Lb: | 215 |
| Played For: | Buffalo Sabres |
| Birth Date: | November 18, 1951 |
| Birth Place: | Radisson, Saskatchewan, Canada |
| Draft: | 33rd overall |
| Draft Year: | 1971 |
| Draft Team: | Buffalo Sabres |
| Career Start: | 1972 |
| Career End: | 1987 |
William Albert Hajt (born November 18, 1951) is a Canadian former professional ice hockey defenceman who played in the NHL from 1973 until 1987. He featured in the 1975 Stanley Cup Finals with the Buffalo Sabres.
Hajt was drafted 33rd overall by the Buffalo Sabres in the 1971 NHL Amateur Draft. He played 854 career NHL games, all with the Sabres, scoring 42 goals and 202 assists for 244 points. His highest point total of his career was actually his rookie season, when he registered 29 points and a plus minus rating of +47.
Bill is the father of Ontario Reign assistant coach Chris Hajt who played six games in the National Hockey League for the Edmonton Oilers and the Washington Capitals.
| Regular season | Playoffs | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Season | Team | League | GP | G | A | Pts | PIM | GP | G | A | Pts | PIM | ||
| 1967–68 | Saskatoon Blades | WCHL | 60 | 4 | 10 | 14 | 35 | 7 | 0 | 1 | 1 | 2 | ||
| 1968–69 | Saskatoon Blades | WCHL | 60 | 3 | 18 | 21 | 54 | 4 | 0 | 0 | 0 | 0 | ||
| 1969–70 | Saskatoon Blades | WCHL | 60 | 10 | 21 | 31 | 40 | 7 | 2 | 3 | 5 | 8 | ||
| 1970–71 | Saskatoon Blades | WCHL | 66 | 19 | 53 | 72 | 50 | 5 | 1 | 4 | 5 | 2 | ||
| 1972–73 | Cincinnati Swords | AHL | 69 | 4 | 31 | 35 | 40 | 15 | 2 | 9 | 11 | 14 | ||
| 1973–74 | Buffalo Sabres | NHL | 6 | 0 | 2 | 2 | 0 | — | — | — | — | — | ||
| 1973–74 | Cincinnati Swords | AHL | 66 | 5 | 30 | 35 | 66 | 5 | 0 | 4 | 4 | 4 | ||
| 1974–75 | Buffalo Sabres | NHL | 76 | 3 | 26 | 29 | 68 | 17 | 1 | 4 | 5 | 18 | ||
| 1975–76 | Buffalo Sabres | NHL | 80 | 6 | 21 | 27 | 48 | 9 | 0 | 1 | 1 | 15 | ||
| 1976–77 | Buffalo Sabres | NHL | 79 | 6 | 20 | 26 | 56 | 6 | 0 | 1 | 1 | 4 | ||
| 1977–78 | Buffalo Sabres | NHL | 76 | 4 | 18 | 22 | 30 | 8 | 0 | 0 | 0 | 2 | ||
| 1978–79 | Buffalo Sabres | NHL | 40 | 3 | 8 | 11 | 20 | — | — | — | — | — | ||
| 1979–80 | Buffalo Sabres | NHL | 75 | 4 | 12 | 16 | 24 | 14 | 0 | 5 | 5 | 4 | ||
| 1980–81 | Buffalo Sabres | NHL | 68 | 2 | 19 | 21 | 42 | 8 | 0 | 2 | 2 | 17 | ||
| 1981–82 | Buffalo Sabres | NHL | 65 | 2 | 9 | 11 | 44 | 2 | 0 | 0 | 0 | 0 | ||
| 1982–83 | Buffalo Sabres | NHL | 72 | 3 | 12 | 15 | 26 | 10 | 0 | 0 | 0 | 4 | ||
| 1983–84 | Buffalo Sabres | NHL | 79 | 3 | 24 | 27 | 32 | 3 | 0 | 0 | 0 | 0 | ||
| 1984–85 | Buffalo Sabres | NHL | 57 | 5 | 13 | 18 | 14 | 3 | 1 | 3 | 4 | 6 | ||
| 1985–86 | Buffalo Sabres | NHL | 58 | 1 | 16 | 17 | 25 | — | — | — | — | — | ||
| 1986–87 | Buffalo Sabres | NHL | 23 | 0 | 2 | 2 | 4 | — | — | — | — | — | ||
| NHL totals | 854 | 42 | 202 | 244 | 433 | 80 | 2 | 16 | 18 | 70 | ||||