The 2018–19 Danish 1st Division season is the 23rd season of the Danish 1st Division league championship, governed by the Danish Football Association. The division-champion will be promoted to the 2019–20 Danish Superliga, while the runners-up and the third placed team will face promotion playoffs. The teams in 11th and 12th places are relegated to the 2019–20 Danish 2nd Divisions.