The 2023 Besta deild karla was the 112th season of top-flight Icelandic football. It was the second season of the league after it was rebranded as Besta deild karla.
The winners (Víkingur Reykjavík) qualified for the 2024–25 Champions League first qualifying round. The second, third, and fourth-placed teams (Breiðablik, Stjarnan, and Valur) qualified for the 2024–25 Conference League first qualifying round. The bottom two teams (ÍBV and Keflavík) were relegated to the 2024 1. deild karla.
Teams
The league consisted of twelve teams; the top ten teams from the previous season, and two teams promoted from 1. deild karla. Breiðablik were the defending champions after winning their second league title during the previous season.
Team changes
Stadia and locations
Notes
Regular season
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Results
Each team plays each other twice (22 matches each), once at home and once away.
Championship Round
League table
Results
Each team plays each other once (5 matches), either at home or away.
Relegation Round
League table
Results
Each team plays each other once (5 matches), either at home or away.