| Mart McQuaid | |
| Position: | Second baseman/Outfielder |
| Bats: | Unknown |
| Throws: | Unknown |
| Birth Date: | 28 June 1861 |
| Birth Place: | Chicago |
| Death Place: | Chicago |
| Debutleague: | MLB |
| Debutdate: | August 15 |
| Debutyear: | 1891 |
| Debutteam: | St. Louis Browns |
| Finalleague: | MLB |
| Finaldate: | August 25 |
| Finalyear: | 1898 |
| Finalteam: | Washington Senators |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .267 |
| Stat2label: | Home runs |
| Stat2value: | 0 |
| Stat3label: | Runs batted in |
| Stat3value: | 1 |
| Teams: |
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Mortimer Martin McQuaid (June 28, 1861 – March 5, 1928), was a professional baseball second baseman and outfielder in Major League Baseball for the 1891 St. Louis Browns and 1898 Washington Senators.