| 1878 Boston Red Caps | |
|---|---|
| National League Champions | |
| League | National League |
| Ballpark | South End Grounds |
| City | Boston, Massachusetts |
| Record | 41–19 (.683) |
| League place | 1st |
| Owner | Arthur Soden |
| Manager | Harry Wright |
The 1878 Boston Red Caps season was the eighth season of the franchise. The Red Caps won their second straight National League pennant.