| Patrick O'Loughlin | |
| Position: | Right fielder |
| Bats: | Unknown |
| Throws: | Unknown |
| Birth Date: | May 1860 |
| Birth Place: | Ireland |
| Death Date: | May 18, 1927 (aged 67) |
| Death Place: | Lowell, Massachusetts |
| Debutleague: | MLB |
| Debutdate: | May 9 |
| Debutteam: | Baltimore Orioles |
| Finalleague: | MLB |
| Finaldate: | May 9 |
| Finalteam: | Baltimore Orioles |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .400 |
| Stat2label: | At bats |
| Stat2value: | 5 |
| Stat3label: | Hits |
| Stat3value: | 2 |
| Teams: |
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Patrick Henry O'Loughlin (1860–1927) was an Irish born 19th-century outfielder who played in Major League Baseball. Sometimes credited as Patrick Loughlin or simply "Loughlin", he appeared in one game at right field for the 1883 Baltimore Orioles of the American Association. In that game, he got two hits in five at bats.