The 2017–18 season was Partick Thistle's fifth consecutive season in the top flight of Scottish football and the fifth in the newly established Scottish Premiership,[1] having been promoted from the Scottish First Division at the end of the 2012–13 season.

Thistle competed in the 2017–18 Scottish League Cup where they finished second in Group H behind Livingston by 1 point and qualified for the Second Round.

In the second round they surpassed St Johnstone and in the Quarter Finals took Rangers to extra time after Kris Doolan scored an injury time equaliser to make it 1–1, however lost 3–1 after extra time.

[2] Partick Thistle also competed in the Scottish Cup, where they lost in an away tie to Celtic in the fifth round.

[3] They ended the season being relegated from the Premiership via the play-offs, dropping to the Scottish Championship.