| Position: | Defence |
| Shoots: | Left |
| Height Ft: | 5 |
| Height In: | 11 |
| Weight Lb: | 201 |
| Birth Date: | September 23, 1957 |
| Birth Place: | Toronto, Ontario, Canada |
| Career Start: | 1977 |
| Career End: | 1982 |
| Draft: | Undrafted |
| Played For: | Colorado Rockies |
Mario Giallonardo (born September 23, 1957) is a former professional ice hockey defenceman. He played 23 games in the National Hockey League with the Colorado Rockies between 1979 and 1981.
| Regular season | Playoffs | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Season | Team | League | GP | PIM | GP | G | A | Pts | PIM | |||||
| 1974–75 | Markham Waxers | OPJHL | — | — | — | — | — | — | — | — | — | — | ||
| 1975–76 | Union College | NCAA-III | — | — | — | — | — | — | — | — | — | — | ||
| 1976–77 | Union College | NCAA-III | 26 | 5 | 26 | 31 | — | — | — | — | — | — | ||
| 1976–77 | Windsor Spitfires | OMJHL | 5 | 0 | 1 | 1 | 7 | 9 | 1 | 1 | 2 | 25 | ||
| 1977–78 | Union College | NCAA-III | — | — | — | — | — | — | — | — | — | — | ||
| 1977–78 | Toledo Goaldiggers | IHL | 25 | 1 | 6 | 7 | 34 | 17 | 0 | 9 | 9 | 28 | ||
| 1978–79 | Philadelphia Firebirds | AHL | 70 | 1 | 18 | 19 | 100 | — | — | — | — | — | ||
| 1979–80 | Fort Worth Texans | CHL | 70 | 8 | 25 | 33 | 105 | 15 | 2 | 4 | 6 | 47 | ||
| 1979–80 | Colorado Rockies | NHL | 8 | 0 | 1 | 1 | 2 | — | — | — | — | — | ||
| 1980–81 | Fort Worth Texans | CHL | 57 | 4 | 18 | 22 | 113 | — | — | — | — | — | ||
| 1980–81 | Colorado Rockies | NHL | 15 | 0 | 2 | 2 | 4 | — | — | — | — | — | ||
| 1981–82 | Fort Worth Texans | CHL | 13 | 0 | 4 | 4 | 20 | — | — | — | — | — | ||
| NHL totals | 23 | 0 | 3 | 3 | 6 | — | — | — | — | — | ||||