[1] The division is organized by the regional branches of the Danish Football Association (DBU).
It has previously been known as B-rækken (up until 1921–22) and Mellemrækken (1947–1984), before settling with the current name of Serie 1 in 1985.
Each club in the groups play the others twice, once at their home stadium and once at that of their opponents.
The Bornholm and Lolland-Falster Series 1 tiers are named Bornholmsserien and LF-Serien.
The Danish Football Association is responsible for the administration of the fourth tier Denmark Series and the higher tiers of the Danish football league system.