| Founded | 1964 |
|---|---|
| First season | 1964 |
| Country |  Iceland |
| Confederation | FIBA Europe |
| Number of teams | 12 |
| Level on pyramid | 2 |
| Promotion to | Úrvalsdeild |
| Relegation to | 2. deild karla |
| Domestic cup(s) | Bikarkeppni KKÍ |
| Supercup | Meistarakeppni karla |
| Current champions | KR (1st title) |
| Most championships | Þór Akureyri (7 titles) |
| CEO | Hannes S. Jónsson |
| TV partners | Stöð 2 Sport, RÚV |
| Website | KKÍ.is |
1. deild karla (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 (Icelandic: Körfuknattleikssamband Íslands - KKÍ). 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 Úrvalsdeild karla. The bottom club is relegated, and replaced by the four-team playoff round winner of the third-tier 2. deild karla.