HŠK Posušje is a professional association football club based in Posušje that is situated in Bosnia and Herzegovina. The club is best known for winning the First League of Herzeg-Bosnia in 1999 and 2000, the top flight ethnic Croatian league in Bosnia at the time. Currently, Posušje competes in the Premier League of Bosnia and Herzegovina and plays its home matches at the Mokri Dolac Stadium, which has a capacity of 8,000 seats. The club played in the First League of the Federation of Bosnia and Herzegovina until the 2020–21 First League of FBiH season, after which it gained promotion to the Bosnian Premier League. Previously, Posušje won the southern group of the Second League of FBiH in the 2017–18 season, going 12 rounds undefeated to start the season. However, the club did not gain promotion after losing to Goražde in the play-offs. Previous names of the club have included NK Zidar (from 1950) and NK Boksit (from 1963), with the current name being adopted in the early 1990s. Posušje's fans are now known as the Poskoci (Horned Vipers), but were previously known as Torcida. The stadium's name, "Mokri Dolac", means 'Wet Valley'.