2018–19 Scottish League One

The 2018–19 Scottish League One (known as the Ladbrokes League One for sponsorship reasons) will be the is the 24th season in the current format of 10 teams in the third-tier of Scottish football. The fixtures will be published on 15 June 2018 and the season will begin on 4 August 2018.

Ten teams will contest the league: Airdrieonians, Arbroath, Brechin City, Dumbarton, East Fife, Forfar Athletic, Montrose, Raith Rovers, Stenhousemuir and Stranraer.

Teams
The following teams have changed division since the 2017–18 season.

To League One
Promoted from League Two
 * Montrose
 * Stenhousemuir

Relegated from the Championship
 * Brechin City
 * Dumbarton

From League One
Relegated to League Two
 * Albion Rovers
 * Queen's Park

Promoted to the Championship
 * Ayr United
 * Alloa Athletic

Positions by Round
The table lists the positions of teams after each week of matches. In order to preserve chronological progress, any postponed matches are not included in the round at which they were originally scheduled but added to the full round they were played immediately afterwards. For example, if a match is scheduled for matchday 13, but then postponed and played between days 16 and 17, it will be added to the standings for day 16.

League One play-offs
The second bottom team will enter into a four-team playoff with the second-fourth placed teams in League Two.