| 1963 Senior League World Series | |
| Start Date: | August 15 |
| End Date: | 17, 1963 |
| Champion: | -->  Monterrey, Mexico |
| Runner-Up1: | --> Downey, California |
| Runner-Up2: | --> |
| Previous: | 1962 |
| Next: | 1964 |
The 1963 Senior League World Series took place from August 15–17 in Bethlehem, Pennsylvania, United States. Monterrey, Mexico defeated Downey, California in the championship game. This was the only edition held in Bethlehem.
This was the first SLWS to feature an international squad.
| United States | International |
|---|---|
| Pompton Lakes, New Jersey East | Monterrey, Mexico Latin America |
| Gary, Indiana East Glen Park North | |
| Randleman, North Carolina South | |
| Downey, California West |