The 2017–18 Scottish League One (known as Ladbrokes League One for sponsorship reasons) was the 23rd season in the format of 10 teams in the third-tier of Scottish football. The fixtures were published on 23 June 2017. Ten teams contested the league: Airdrieonians, Albion Rovers, Alloa Athletic, Arbroath, Ayr United, East Fife, Forfar Athletic, Queen's Park, Raith Rovers and Stranraer.