| Thomas Lynch | |
| Birth Date: | 1859 |
| Birth Place: | New Britain, Connecticut, U.S. |
| Death Place: | Hartford, Connecticut, U.S. |
| Nationality: | American |
| Occupation: | Umpire, National League president |
Thomas J. Lynch (1859 – February 27, 1924) was an umpire in Major League Baseball for 13 seasons, all of which were in the National League (NL), between the years of and .[1] Known as an honest, but sometimes brash umpire, he later became NL president in as a compromise among the major league owners.[2] Although his time as league president was considered uneventful, he was replaced following the 1913 season.[2]
In 1946 Lynch had been named to the Honor Rolls of Baseball by the National Baseball Hall of Fame.