HŠK Zrinjski Mostar

HŠK Zrinjski Mostar (Croatian: Hrvatski športski klub Zrinjski Mostar, lit. 'Croat Sports Club Zrinjski Mostar'), colloquially referred to as Zrinjski Mostar or simply Zrinjski, is a professional football club, based in Mostar, Bosnia and Herzegovina. The club plays in the Premier League of Bosnia and Herzegovina and with nine Premier League titles, Zrinjski is one of the most decorated football clubs in the country. The club plays its home matches at Stadion pod Bijelim Brijegom in Mostar. Zrinjski's fans are called Ultras Mostar, and the fan club was founded in 1994. In 2023, they became the first-ever club from Bosnia and Herzegovina to reach the group stage of a European club competition, the 2023–24 UEFA Europa Conference League.

Zrinjski Mostar was founded by Croat youth in 1905 in what was then Austria-Hungary and is the oldest football club in Bosnia and Herzegovina. After World War II, all clubs that had participated in the wartime Croatian league were banned in the Yugoslavia, with Zrinjski among them. The ban lasted from 1945 to 1992. The club was reformed after Bosnia and Herzegovina's independence. It played in the First League of Herzeg-Bosnia until 2000 when it joined the Premier League. In 2005, Zrinjski celebrated its first championship crown in the Premier League of Bosnia and Herzegovina.