| Classification | Independent (1884–1885) |
|---|---|
| Sport | Minor League Baseball |
| First season | 1884 |
| Ceased | 1885 |
| President | Thomas Hargreaves (1884–1885) |
| No. of teams | 5 |
| Country | United States of America |
| Most titles | 1 Lancaster Red Stockings (1884) |
| Related competitions | Eastern League (1884) Pennsylvania State League (1883) |
The Keystone Association was a five–team independent level baseball minor league that played in the 1884 and 1885 seasons. The Keystone Association featured franchises based exclusively in Pennsylvania.