The 2018–19 Úrvalsdeild karla was the 68th season of the Úrvalsdeild karla, the top tier men's basketball league in Iceland.

The season started on 4 October 2018 and ended on 4 May 2019.

KR won its sixth title in a row by defeating ÍR 3–2 in the Finals.

[1] The participating teams first played a conventional round-robin schedule with every team playing each opponent once home and once away for a total of 22 games.

[2] The playoffs are played between the eight first qualified teams with a 1-1-1-1-1 format, playing seeded teams games 1, 3 and 5 at home.