1998–99 Danish 1st Division

The 1998–99 Danish 1st Division season was the 54th season of the Danish 1st Division league championship and the 13th consecutive as a second tier competition governed by the Danish Football Association.

The division-champion and runner-up promoted to the 1999–2000 Danish Superliga. The teams in the 13th to 16th spots were relegated to the 1999–2000 Danish 2nd Division.