| Played For: | Toronto Maple Leafs |
| Position: | Left wing |
| Shoots: | Left |
| Height Ft: | 5 |
| Height In: | 8 |
| Weight Lb: | 160 |
| Birth Date: | May 17, 1927 |
| Birth Place: | Winnipeg, Manitoba, Canada |
| Career Start: | 1948 |
| Career End: | 1955 |
Allaster William Buchanan (May 17, 1927 – January 17, 1994) was a Canadian professional ice hockey left winger who played four games in the National Hockey League with the Toronto Maple Leafs during the 1948–49 and 1949–50 seasons. The rest of his career, which lasted from 1948 to 1955, was spent in the minor leagues.
| Regular season | Playoffs | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Season | Team | League | GP | PIM | GP | G | A | Pts | PIM | |||||
| 1944–45 | Winnipeg Monarchs | MJHL | 6 | 5 | 5 | 10 | 0 | 6 | 5 | 2 | 7 | 4 | ||
| 1944–45 | Winnipeg Monarchs | M-Cup | — | — | — | — | — | 10 | 4 | 2 | 6 | 4 | ||
| 1945–46 | Winnipeg Monarchs | MJHL | 9 | 7 | 0 | 7 | 0 | 7 | 2 | 1 | 3 | 0 | ||
| 1945–46 | Winnipeg Monarchs | M-Cup | — | — | — | — | — | 17 | 6 | 4 | 10 | 14 | ||
| 1946–47 | Winnipeg Monarchs | MJHL | 15 | 16 | 9 | 25 | 11 | 6 | 1 | 4 | 5 | 7 | ||
| 1947–48 | Toronto Marlboros | OHA | 34 | 22 | 24 | 46 | 0 | 5 | 0 | 0 | 0 | 0 | ||
| 1948–49 | Toronto Maple Leafs | NHL | 3 | 0 | 1 | 1 | 2 | — | — | — | — | — | ||
| 1948–49 | Toronto Marlboros | OHA Sr | 37 | 21 | 16 | 37 | 33 | 10 | 1 | 3 | 4 | 26 | ||
| 1948–49 | Toronto Marlboros | Al-Cup | — | — | — | — | — | 13 | 3 | 8 | 11 | 15 | ||
| 1949–50 | Toronto Maple Leafs | NHL | 1 | 0 | 0 | 0 | 0 | — | — | — | — | — | ||
| 1949–50 | Toronto Marlboros | OHA Sr | 35 | 21 | 24 | 45 | 21 | 14 | 7 | 4 | 11 | 4 | ||
| 1949–50 | Toronto Marlboros | Al-Cup | — | — | — | — | — | 16 | 10 | 11 | 21 | 2 | ||
| 1950–51 | Toronto Marlboros | OMHL | 32 | 14 | 19 | 33 | 25 | 3 | 1 | 1 | 2 | 2 | ||
| 1951–52 | Saint John Beavers | MMHL | 77 | 21 | 33 | 54 | 44 | 3 | 1 | 1 | 2 | 0 | ||
| 1952–53 | Kitchener-Waterloo Dutchmen | OHA Sr | 46 | 20 | 21 | 41 | 24 | 11 | 1 | 2 | 3 | 8 | ||
| 1952–53 | Kitchener-Waterloo Dutchmen | Al-Cup | — | — | — | — | — | 17 | 3 | 9 | 12 | 11 | ||
| 1954–55 | Niagara Falls Cataracts | OHA Sr | 36 | 8 | 10 | 18 | 10 | — | — | — | — | — | ||
| OHA Sr totals | 154 | 70 | 71 | 141 | 88 | 35 | 9 | 9 | 18 | 38 | ||||
| NHL totals | 4 | 0 | 1 | 1 | 2 | — | — | — | — | — | ||||