Karlovac plays their home matches at Stadion Branko Čavlović-Čavlek.

Led by manager Igor Pamić, Karlovac won consecutive promotions in the 2007–08 and 2008–09 seasons, which saw them join the top level for the first time in their history.

They faced relegation to second division but due to financial irregularities, Karlovac was suspended by Croatian Football Federation.

Following World War II Velebit was disbanded and re-established as FD Udarnik, which was then renamed in 1948 SD Slavija before adopting their current name NK Karlovac in 1954.

Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.