The 2012–13 Danish 1st Division season was the 17th season of the Danish 1st Division league championship, governed by the Danish Football Association. This was the first season with a twelve-club First Division. The divisional champions and runners-up are promoted to the 2013–14 Danish Superliga. The teams in the 11th and 12th places are relegated to the 2013–14 Danish 2nd Divisions.