| Tom Colcolough | |
| Position: | Pitcher |
| Bats: | Right |
| Throws: | Right |
| Birth Date: | 8 October 1870 |
| Birth Place: | Charleston, South Carolina, U.S. |
| Death Place: | Charleston, South Carolina, U.S. |
| Debutleague: | MLB |
| Debutdate: | August 1 |
| Debutyear: | 1893 |
| Debutteam: | Pittsburgh Pirates |
| Finalleague: | MLB |
| Finaldate: | July 16 |
| Finalyear: | 1899 |
| Finalteam: | New York Giants |
| Statleague: | MLB |
| Stat1label: | Win–loss record |
| Stat1value: | 14–11 |
| Stat2label: | Earned run average |
| Stat2value: | 5.67 |
| Stat3label: | Strikeouts |
| Stat3value: | 65 |
| Teams: |
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Thomas Bernard Colcolough (October 8, 1870 – December 10, 1919) was a professional baseball player. He was a right-handed pitcher over parts of four seasons (1893–1895, 1899) with the Pittsburgh Pirates and New York Giants. For his career, he compiled a 14–11 record in 47 appearances, with a 5.67 earned run average and 65 strikeouts.
Colcolough was born and later died in Charleston, South Carolina at the age of 49.