The 2018 Liga 3 was the second season of the Liga 3 under its current name, the third season under its current league structure, and the only amateur league football competition in Indonesia. The league was divided into the regional stage and the national stage. Every amateur team in Indonesia competed in its provincial stage of the league and the teams which relegated from 2017 Liga 2 competed in the national zone preliminary round. Persik defeated PSCS 3–2 on aggregate to win their first Liga 3 title.