James O'Hara | |
|---|---|
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| Born | c. 1752 County Mayo, Kingdom of Ireland |
| Died | December 17, 1819 Pittsburgh, U.S. |
| Allegiance | United Kingdom (1770–1771) United States (after 1772) |
| Service/ | British Army Continental Army U.S. Army |
| Rank | Quartermaster General |
| Unit | Coldstream Guards 3rd Virginia Regiment |
| Battles/wars | American Revolutionary War |
James O'Hara (c. 1752 – 1819) was an American military officer, businessman, and captain of early industry in Pittsburgh, Pennsylvania, United States.