The 2017–18 Croatian Women's First Football League (Prva hrvatska nogometna liga za žene) was the twenty seventh season of Croatian Women's First Football League, the national championship for women's association football teams in Croatia, since its establishment in 1992. The season started on 23 September 2017 and ended on 20 May 2018. The league was contested by ten teams and played in a double round robin format, with each team playing every other team two times over 18 rounds. ŽNK Osijek were the defending champions, having won their twenty first title in 2016–17.