| Position: | Defenceman |
| Shoots: | Left |
| Height Ft: | 6 |
| Height In: | 0 |
| Weight Lb: | 185 |
| Birth Date: | 7 April 1926 |
| Birth Place: | Montreal, Quebec, Canada |
| Death Place: | York, Ontario, Canada |
| Career Start: | 1941 |
| Career End: | 1957 |
| Played For: | Toronto Maple Leafs |
Robert Ross Johnstone (April 7, 1926 – December 31, 2009) was a Canadian professional ice hockey player who played 42 games in the National Hockey League with the Toronto Maple Leafs during the 1943–44 and 1944–45 seasons. In 1945 his name was put on the Stanley Cup. He was born in Montreal, Quebec.
| Regular season | Playoffs | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Season | Team | League | GP | PIM | GP | G | A | Pts | PIM | |||||
| 1942–43 | Toronto Marlboros | OHA | 19 | 1 | 9 | 10 | 16 | 3 | 0 | 1 | 1 | 6 | ||
| 1942–43 | Oshawa Generals | OHA | — | — | — | — | — | 13 | 3 | 3 | 6 | 27 | ||
| 1942–43 | Oshawa Generals | M-Cup | — | — | — | — | — | 11 | 2 | 3 | 5 | 223 | ||
| 1943–44 | Toronto Maple Leafs | NHL | 18 | 2 | 0 | 2 | 6 | 3 | 0 | 0 | 0 | 0 | ||
| 1943–44 | Providence Reds | AHL | 6 | 1 | 0 | 1 | 2 | — | — | — | — | — | ||
| 1944–45 | Toronto Maple Leafs | NHL | 24 | 3 | 4 | 7 | 8 | — | — | — | — | — | ||
| 1945–46 | Pittsburgh Hornets | AHL | 56 | 1 | 7 | 8 | 23 | — | — | — | — | — | ||
| 1946–47 | Springfield Indians | AHL | 33 | 1 | 7 | 8 | 2 | 2 | 1 | 0 | 1 | 0 | ||
| 1947–48 | Springfield Indians | AHL | 68 | 2 | 19 | 21 | 10 | — | — | — | — | — | ||
| 1948–49 | New Haven Ramblers | AHL | 10 | 1 | 3 | 4 | 2 | — | — | — | — | — | ||
| 1949–50 | Detroit Hettche | IHL | 18 | 7 | 3 | 10 | 6 | 3 | 1 | 0 | 1 | 0 | ||
| 1950–51 | Toronto Marlboros | OMHL | 31 | 7 | 6 | 13 | 36 | 3 | 1 | 1 | 2 | 0 | ||
| 1951–52 | Atlantic City Sea Gulls | EAHL | 38 | 7 | 10 | 17 | 8 | — | — | — | — | — | ||
| AHL totals | 173 | 6 | 36 | 42 | 39 | 2 | 1 | 0 | 1 | 0 | ||||
| NHL totals | 42 | 5 | 4 | 9 | 14 | 3 | 0 | 0 | 0 | 0 | ||||