| Don Marion | |
| Position: | Pitcher |
| Bats: | Right |
| Throws: | Right |
| Birth Date: | 31 July 1889 |
| Birth Place: | Bowling Green, Ohio |
| Death Place: | Milwaukee, Wisconsin |
| Debutleague: | MLB |
| Debutdate: | April 23 |
| Debutyear: | 1914, |
| Debutteam: | Brooklyn Tip-Tops |
| Finalleague: | MLB |
| Finaldate: | September 30 |
| Finalyear: | 1915, |
| Finalteam: | Brooklyn Tip-Tops |
| Statleague: | MLB |
| Stat1label: | Win–loss record |
| Stat1value: | 15–11 |
| Stat2label: | Earned run average |
| Stat2value: | 3.42 |
| Stat3label: | Strikeouts |
| Stat3value: | 87 |
| Teams: |
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Donald George Marion (July 31, 1889 – January 18, 1933) was a pitcher in Major League Baseball in 1914 and 1915.