The 2018 1. deild karla (English: Men's First Division) was the 64th season of the second-tier Icelandic football.
Twelve teams competed in the league.
The season began on 5 May and concluded on 22 September.
[1] The league is contested by twelve clubs.
Eight remained in the division from the 2017 season, while four new clubs joined the 1. deild karla: Each team plays every opponent once home and away for a total of 22 matches per club, and 132 matches altogether.