The A Lyga 2018 was the 29th season of the highest Lithuanian league in men's soccer . It began on February 24, 2018 and ended on November 18, 2018 with the 5th matchday of the championship round. The defending champion was Sūduva Marijampolė .
As in the previous season, the league was played with eight teams. Each team played four times against each other team, twice at home and twice away. In the event of a tie, the direct comparison counted . Then the first six clubs played in a single round (5 games each) for the championship. The last one was relegated directly, the penultimate one had to go into relegation.
The seventh-placed team at the end of the regular season played in a return match against the second-placed team in the second division. The games took place on October 28 and November 4, 2018.