| Season: | 1989–90 |
| League Result: | 4th |
| Cup1 Result: | 5th round |
| Cup2 Result: | 1st round |
| League Topscorer: | Tanju Çolak (19) |
| Season Topscorer: | Tanju Çolak (20) |
| Highest Attendance: | 30,580 vs FK Crvena Zvezda (European Cup, 14 September 1989) |
| Lowest Attendance: | 6,483 vs Bursaspor (1. Lig, 6 May 1990) |
| Average Attendance: | 18,076 |
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The 1989–90 season was Galatasaray's 86th in existence and the 32nd consecutive season in the 1. Lig. This article shows statistics of the club's players in the season, and also lists all matches that the club have played in the season.
| No. | Pos. | Name | 1. Lig | Türkiye Kupası | Uefa Cup | Total | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Apps | Goals | Apps | Goals | Apps | Goals | Apps | Goals | ||||
| align="left" | - | GK | Zoran Simović | 28 | 0 | 1 | 0 | 2 | 0 | 31 | 0 |
| align="left" | - | GK |  Hayrettin Demirbaş | 6 | 0 | 0 | 0 | 0 | 0 | 6 | 0 |
| align="left" | - | DF | Semih Yuvakuran | 26 | 2 | 1 | 0 | 1 | 0 | 28 | 2 |
| align="left" | - | DF | Cüneyt Tanman (C) | 28 | 3 | 1 | 0 | 2 | 0 | 31 | 3 |
| align="left" | - | DF | İsmail Demiriz | 26 | 0 | 0 | 0 | 1 | 0 | 27 | 0 |
| align="left" | - | DF | Serhat Güller | 21 | 0 | 1 | 0 | 2 | 0 | 24 | 0 |
| align="left" | - | DF | Bülent Korkmaz | 19 | 0 | 0 | 0 | 2 | 0 | 21 | 0 |
| align="left" | - | DF | Yusuf Altıntaş | 15 | 0 | 0 | 0 | 1 | 0 | 16 | 0 |
| align="left" | - | DF | Erhan Önal | 27 | 1 | 1 | 0 | 1 | 0 | 29 | 1 |
| align="left" | - | MF | Savaş Koç | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0 |
| align="left" | - | MF | Muhammet Altıntaş | 29 | 1 | 1 | 0 | 1 | 0 | 31 | 1 |
| align="left" | - | MF | Tugay Kerimoğlu | 24 | 0 | 1 | 0 | 2 | 0 | 27 | 0 |
| align="left" | - | MF | Savaş Demiral | 22 | 4 | 0 | 0 | 0 | 0 | 22 | 4 |
| align="left" | - | MF | Metin Yıldız | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 |
| align="left" | - | MF | Ziya Yıldız | 3 | 0 | 0 | 0 | 0 | 0 | 3 | 0 |
| align="left" | - | MF | Xhevat Prekazi | 27 | 6 | 0 | 0 | 2 | 0 | 29 | 6 |
| align="left" | - | FW | İlyas Tüfekçi | 6 | 0 | 0 | 0 | 2 | 0 | 8 | 0 |
| align="left" | - | FW | Bülent Alkılıç | 6 | 0 | 1 | 0 | 2 | 0 | 9 | 0 |
| align="left" | - | FW | Erdal Keser | 28 | 7 | 1 | 0 | 1 | 0 | 30 | 7 |
| align="left" | - | FW | Hasan Vezir | 29 | 11 | 1 | 1 | 2 | 1 | 32 | 13 |
| align="left" | - | FW | Tanju Çolak | 24 | 19 | 1 | 1 | 0 | 0 | 25 | 20 |
| align="left" | - | FW | Uğur Tütüneker | 29 | 4 | 0 | 1 | 0 | 0 | 30 | 4 |
| FW | Hasan Vezir | 27 | Fenerbahçe SK | |
| FW | Erdal Keser | 28 | Sarıyer G.K. | |
| FW | Ziya Yıldız | 29 | Adana Demirspor | |
| DF | Serhat Güller | 21 | İnegölspor | |
| DF | Arif Kocabıyık | 31 | Bursaspor | |
| FW | Mirsad Kovačevič | 33 | Göztepe S.K. | |
| MF | Savaş Koç (on loan) | 26 | MKE Ankaragücü | |
| DF | İhsan Okay | 26 | Gaziantepspor | |
| FW | Metin Yıldız (on loan) | 29 | Zeytinburnuspor | |
| FW | Ziya Yıldız (on loan) | 29 | MKE Ankaragücü | |
See main article: 1989–90 1.Lig.
Kick-off listed in local time (EET)
See main article: 1989–90 UEFA Cup.
Kick-off listed in local time (EET)
Kick-off listed in local time (EET)
| Competition | Av. Att. | Total Att. |
|---|---|---|
| 1. Lig | 18,076 | 289,214 |
| UEFA Cup | 30,580 | 30,580 |
| Total | 18,811 | 319,794 |