The 2017 A Lyga was the 28th season of the A Lyga, the top-tier association football league of Lithuania. The season began on 3 March 2017 and ended on 19 November 2017.

All eight teams from the previous season remained and competed in the league, while Žalgiris Vilnius began the season as defending champions having won fourth consecutive league title last year.

Sūduva Marijampolė won the championship for the first time in their 96-year history, becoming the eighth club to win the league since its creation in 1991.

A total of eight teams should have contested the league, including six sides from the previous season, one promoted from the 2016 LFF I Lyga and the winners of the 2016 A Lyga Relegation play-offs.

Utenis managed to withstand against I Lyga runners-up Palanga in the play-offs and for the 3rd consecutive season continued to play in the A Lyga.

2015 LFF I Lyga champions FK Lietava changed they name to FK Jonava after received permission from Lithuanian Football Federation.

Kauno Žalgiris were relegated at the end of 2016 season and replaced by 2016 LFF I Lyga champions Šilas. It was going to be a debut in the top tier for Kazlų Rūda team.

Before the beginning of the season, newcomers Šilas were accused of match-fixing during a 2017 Virsligas Winter Cup match with FS METTA. Soon after Lithuanian Football Federation started an investigation to determine validity of these claims. At the time all club trainings and friendly matches were revoked. On 24 February, club chairman Audrius Raškauskas announced, that players received a permission to look for the new clubs while Šilas most probably will withdraw from the league into lower divisions of Lithuanian football.