The 2019–20 Danish 1st Division season was the 24th season of the Danish 1st Division league championship, governed by the Danish Football Association. The division-champion was promoted to the 2020–21 Danish Superliga. The teams in 10th, 11th and 12th places were relegated to the 2020–21 Danish 2nd Divisions. The reason for this change in promotion and relegation spots was that the Danish Superliga was reduced to 12 teams following this season.