2018–19 First League of the Federation of Bosnia and Herzegovina

The 2018–19 First League of the Federation of Bosnia and Herzegovina was the 19th season of the First League of the Federation of Bosnia and Herzegovina, the second tier league football in Bosnia and Herzegovina. It began on 11 August 2018 and got concluded on 2 June 2019.

Velež Mostar were crowned champions, winning their second championship title and earning promotion to the Premier League of Bosnia and Herzegovina.