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 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.
Breiðablik entered the season as defending champions.