The Ykkönen 2012 season began on 27 April 2012 and ended on 6 October 2012.
[1] The champions will be directly promoted to the 2013 Veikkausliiga.
The two teams finishing at the bottom of the table will be directly relegated to Kakkonen.
[2] A total of ten teams will contest in the league, including eight sides from the 2011 season, RoPS who was relegated from Veikkausliiga and SJK who promoted from Kakkonen after winning the promotion play-offs.
Updated to games played on 6 October 2012.