Delaware State League
| Classification | Independent (1889) |
|---|---|
| Sport | Minor League Baseball |
| First season | July 8, 1889 |
| Ceased | July 25, 1889 |
| President | Unknown (1889) |
| No. of teams | 5 |
| Country | United States of America |
| Most titles | 1 Dover (1889) |
| Related competitions | Middle States League (1889) |
The Delaware State League was a minor league baseball league that played briefly in the 1889 season. The five–team Independent level Delaware State League consisted exclusively of teams based in Delaware. The Delaware State League played only the 1889 season, with Dover winning the league championship.