| Season: | 1925-26 |
| Winners: | Galatasaray SK (8th title) |
| Nextseason: | 1926-27 |
The 1925–26 İstanbul Football League season was the 19th season of the league. Galatasaray SK won the league for the 8th time. The tournament was single-elimination, not league as in the past.
Quarter Finals
Galatasaray - Beykozspor SK 6:2
Fenerbahçe - Harbiye SK 3:2
Semi finals
Fenerbahçe - Fatih İdman Yurdu SK 9:0
Galatasaray SK - Vefa SK 2:1
Final
Fenerbahçe - Galatasaray SK 0:3
Galatasaray SK - Fenerbahçe 3:1