The Serbian First League (Serbian: Prva liga Srbije) is the second-highest football league in Serbia. The league is operated by the Serbian FA. 16 teams compete in the league for the 2017–18 season. Two teams will be promoted to the Serbian SuperLiga. Four teams will be relegated to the Serbian League, the third-highest division overall in the Serbian football league system. , the winner of decided to forfeit its promotion, as did the second-placed Omladinac Novi Banovci. As a consequence, third-placed TSC Bačka Topola took the vacant place. The season begun in August 2017 and will end in May 2018.