(English: Men's First Division) or D1 is the second-tier basketball competition among clubs in Iceland. It is organized by the Icelandic Basketball Federation (). The season consists of a home-and-away schedule of 18 games, followed by a four-team playoff round. Both semifinals and finals series are best-of-three. The top team from the regular-season phase and the four-team playoff round winner are promoted to the ÃÂrvalsdeild karla. The bottom club is relegated, and replaced by the four-team playoff round winner of the third-tier 2. deild karla.
The was founded in 1964. Up until 1978 it was known as .
For the first years, from its foundation in 1964 until the 1970âÂÂ71 season, the was led by the ÃÂS (with three wins) and ÃÂKF (with two wins).
Some years later, from the 1974âÂÂ75 season, Fram ReykjavÃÂk started their leadership on the and their series of wins, which ended in the 1985âÂÂ86 season when they won their fourth title.
In 1979, Danny Shouse joined ÃÂrmann and took the league by storm. On December 1, 1979, Shouse scored 100 points against SkallagrÃÂmur, setting the Icelandic single-game scoring record. In January 1980 he scored 76 points in an overtime loss against GrindavÃÂk and in February he broke the 70 point barrier again, scoring 72 points against ÃÂór Akureyri. His scoring prowess helped ÃÂrmann win the league and achieve promotion to the ÃÂrvalsdeild karla. Even though Shouse played in the nation's tier 2 league during his first season, he was widely regarded as one of the best players in the country.
After their golden years, in which they won 15 ÃÂrvalsdeild karla titles in less than 25 years, the ÃÂR was relegated to the First Division. In the 1986âÂÂ87 season they won the for their first time and came back to the . Afterwards, the ÃÂR was relegated again to the 1. deild. In the 1999âÂÂ00 season they won their second 1. deild title and came back to the ÃÂrvalsdeild karla.
In the 2006âÂÂ07 season, ÃÂór Akureyri won their fifth title. In the following season, the 2007âÂÂ08 season, Breiðablik also won their fifth title, becoming the most successful franchise together with ÃÂór Akureyri. In the 2011âÂÂ12 season, KFàwon their fourth title.
On 13 March 2020, the rest of the 2019âÂÂ20 season was postponed due to the coronavirus outbreak in Iceland.