| Tod Dennehey | |
| Position: | Left fielder |
| Birth Date: | May 12, 1899 |
| Birth Place: | Philadelphia, Pennsylvania |
| Death Place: | Philadelphia, Pennsylvania |
| Bats: | Left |
| Throws: | Left |
| Debutleague: | MLB |
| Debutdate: | April 21 |
| Debutyear: | 1923 |
| Debutteam: | Philadelphia Phillies |
| Finalleague: | MLB |
| Finaldate: | May 8 |
| Finalyear: | 1923 |
| Finalteam: | Philadelphia Phillies |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .292 |
| Stat2label: | Hits |
| Stat2value: | 7 |
| Stat3label: | Runs |
| Stat3value: | 4 |
| Teams: |
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Thomas Francis Dennehy (May 12, 1899 – August 8, 1977) was a Major League Baseball left fielder who played for one season. He played for the Philadelphia Phillies for nine games during the 1923 Philadelphia Phillies season.