The 2018–19 Scottish League One (known as the Ladbrokes League One for sponsorship reasons) was the 24th season in the current format of 10 teams in the third-tier of Scottish football. The fixtures were published on 15 June 2018 and the season began on 4 August 2018.
Ten teams contested the league: Airdrieonians, Arbroath, Brechin City, Dumbarton, East Fife, Forfar Athletic, Montrose, Raith Rovers, Stenhousemuir and Stranraer.
Arbroath won the league following a 1–1 draw at Brechin City on 13 April 2019. Brechin were relegated after a 1–1 draw with Stenhousemuir on the final day.
Scottish League One 2018-2019