| Competition: | 1.Lig |
| Season: | 1977–78 |
| Winners: | Fenerbahçe 9th title |
| Relegated: | Ankaragücü Mersin İdman Yurdu |
| Continentalcup1: | European Cup |
| Continentalcup1 Qualifiers: | Fenerbahçe |
| Continentalcup2: | UEFA Cup |
| Continentalcup2 Qualifiers: | Galatasaray Adanaspor |
| League Topscorer: | Cemil Turan (17 goals) |
| Matches: | 240 |
| Total Goals: | 474 |
| Prevseason: | 1976–77 |
| Nextseason: | 1978–79 |
Statistics of the Turkish First Football League for the 1977–78 season.
It was contested by 16 teams, and Fenerbahçe S.K. won the championship. Ankaragücü and Mersin İdman Yurdu relegated to Second League. Turkish Cup winners Trabzonspor could not play in 1978–79 European Cup Winners' Cup because they were suspended.