The 2015 1. deild karla (English: Men's First Division) was the 61st season of second-tier Icelandic football. Twelve teams contested the league which began on 8 May and concluded on 19 September.
The league was contested by twelve clubs. Eight remained in the division from the 2014 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; 132 matches altogether.