| Club: | İstanbul Başakşehir |
| Season: | 2019–20 |
| Chrtitle: | President |
| Chairman: | Göksel Gümüşdağ |
| Mgrtitle: | Head coach |
| Manager: | Okan Buruk |
| Stadium: | Başakşehir Fatih Terim Stadium |
| League: | Süper Lig |
| League Result: | 1st |
| Cup1: | Turkish Cup |
| Cup1 Result: | Round of 16 |
| Cup2: | UEFA Champions League |
| Cup2 Result: | Third qualifying round |
| Cup3: | UEFA Europa League |
| Cup3 Result: | Round of 16 |
| League Topscorer: | Demba Ba (13) |
| Season Topscorer: | Edin Višća (20) |
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| Prevseason: | 2018–19 |
| Nextseason: | 2020–21 |
The 2019–20 season was the 6th consecutive season of İstanbul Başakşehir in the Süper Lig and their 30th year in existence. The season was slated to cover a period from 1 July 2019 to 30 June 2020. It was extended extraordinarily beyond 30 June due to the COVID-19 pandemic in Turkey.
On 19 July 2020, Başakşehir were crowned champions of the Turkish Süper Lig for the first time in the club's history.[1] They also became only the sixth club in the competition's history to win the league title.[2]
See main article: 2019–20 Süper Lig.
See main article: 2019–20 Turkish Cup.
See main article: 2019–20 UEFA Champions League.
See main article: 2019–20 UEFA Europa League.
See main article: 2019–20 UEFA Europa League knockout phase.