The 2009–10 Scottish Second Division was the sixteenth season of the Second Division in its current format of ten teams.
Relegated from First Division to Second Division Promoted from Second Division to First Division Relegated from Second Division to Third Division Promoted from Third Division to Second Division Each team plays every other team four times during the season, twice at home and twice away, for a total of 36 matches.
Times are BST (UTC+1) The ninth placed team in the Second Division played the fourth placed team in the Third Division and third placed team in the Third Division played the second placed team in the Third Division.
The play-offs were played over two legs, the winning team in each semi-final advanced to the final.
The winning team was awarded a place in the 2010–11 Second Division.