| Position: | Right wing |
| Played For: | Philadelphia Flyers Hartford Whalers |
| Shoots: | Right |
| Height Ft: | 6 |
| Height In: | 3 |
| Weight Lb: | 210 |
| Birth Date: | 24 December 1960 |
| Birth Place: | Dodsland, Saskatchewan, Canada |
| Draft: | 77th overall |
| Draft Year: | 1979 |
| Draft Team: | Philadelphia Flyers |
| Career Start: | 1980 |
| Career End: | 1984 |
Donald Gillen (born December 24, 1960) is a Canadian former professional ice hockey right winger who played in 35 National Hockey League (NHL) games with the Philadelphia Flyers and Hartford Whalers. He scored a goal in his first NHL game with the Flyers against Edmonton on January 27, 1980.
| Regular season | Playoffs | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Season | Team | League | GP | PIM | GP | G | A | Pts | PIM | |||||
| 1976–77 | Weyburn Red Wings | SJHL | 58 | 13 | 24 | 37 | 170 | — | — | — | — | — | ||
| 1977–78 | Brandon Wheat Kings | WCHL | 60 | 18 | 16 | 34 | 128 | 8 | 0 | 1 | 1 | 11 | ||
| 1978–79 | Brandon Wheat Kings | WHL | 64 | 21 | 30 | 51 | 212 | 22 | 10 | 10 | 20 | 34 | ||
| 1978–79 | Brandon Wheat Kings | M-Cup | — | — | — | — | — | 5 | 0 | 1 | 1 | 24 | ||
| 1979–80 | Brandon Wheat Kings | WHL | 69 | 31 | 56 | 87 | 372 | 10 | 5 | 3 | 8 | 43 | ||
| 1979–80 | Philadelphia Flyers | NHL | 1 | 1 | 0 | 1 | 0 | — | — | — | — | — | ||
| 1979–80 | Maine Mariners | AHL | — | — | — | — | — | 7 | 1 | 2 | 3 | 19 | ||
| 1980–81 | Maine Mariners | AHL | 79 | 30 | 29 | 59 | 255 | 20 | 4 | 4 | 8 | 49 | ||
| 1981–82 | Binghamton Whalers | AHL | 42 | 20 | 10 | 30 | 100 | 15 | 6 | 5 | 11 | 23 | ||
| 1981–82 | Hartford Whalers | NHL | 34 | 1 | 4 | 5 | 22 | — | — | — | — | — | ||
| 1982–83 | Binghamton Whalers | AHL | 80 | 38 | 39 | 77 | 245 | 1 | 0 | 1 | 1 | 0 | ||
| 1983–84 | Binghamton Whalers | AHL | 73 | 27 | 37 | 64 | 140 | — | — | — | — | — | ||
| AHL totals | 274 | 111 | 115 | 230 | 740 | 43 | 11 | 12 | 23 | 91 | ||||
| NHL totals | 35 | 2 | 4 | 6 | 22 | — | — | — | — | — | ||||