It was also confirmed that Ben Gordon, Andy Webster and Jordan Stewart would leave the club when their contracts expire in the summer.

[3] 18 May – highly rated midfielder Stevie Mallan signed a two-year contract with EFL Championship side Barnsley for an undisclosed fee.

Also on this day, forward Cammy Smith left Aberdeen and joined Saints on a two-year deal, after a successful loan spell last season.

[8] Also on this day, Saints signed goalkeeper Ross M. Stewart from Albion Rovers and midfielder Jordan Kirkpatrick from Alloa Athletic.

[9] 2 June – Saints were paired along with Partick Thistle, Airdrieonians, Stranraer and Livingston in the League Cup draw.

[14] 16 June – young midfielder Nathan Flanagan signed a one-year contract with the club, after graduating from the youth setup.

[24] 12 December – striker Danny Mullen signed on an emergency loan from fellow Scottish Championship challengers, Livingston.

[25] 21 December – forward Ross C. Stewart moved on loan to Scottish League One side Alloa Athletic, until the end of the season.

[28] 5 January – Lewis Morgan signed a 4+1⁄2-year contract with Celtic and was immediately loaned back to Saints until the end of the season.

[29] 10 January – striker Darryl Duffy signed on loan for Scottish League One side Airdrieonians until the end of the season.

[33] 15 January – Saints added to the squad when experienced midfielder Ryan Flynn signed, after being recently released by Oldham Athletic.

[38] 1 February – defender Jack Baird signed a one-year extension to his current contract, keeping his at Saints until the summer of 2019.

[41] 20 March – Josh Todd signed for Queen of the South on an emergency loan deal until the end of the season.