The 2019–20 Scottish League One (known as Ladbrokes League One for sponsorship reasons) was the 25th season in the current format of 10 teams in the third-tier of Scottish football. The fixtures were published in June 2019 and the season began on 3 August 2019. Ten teams contested the league: Airdrieonians, Clyde, Dumbarton, East Fife, Falkirk, Forfar Athletic, Montrose, Peterhead, Raith Rovers and Stranraer.