The 2021–22 Scottish League One (known as cinch League One for sponsorship reasons) was the ninth season of Scottish League One, the third tier of Scottish football. The season began on 31 July. Ten teams contested the league: Airdrieonians, Alloa Athletic, Clyde, Cove Rangers, Dumbarton, East Fife, Falkirk, Montrose, Peterhead and Queen's Park.