Fudbalski klub Radnik Bijeljina is a football club based in the city of Bijeljina in northeast Bosnia and Herzegovina. The club won its first First League of the Republika Srpska title in 1998–99, and the second in 2004–05, after which the club was promoted to the newly formed Premier League of Bosnia and Herzegovina. The club was relegated from the Premier League of Bosnia and Herzegovina in the 2006–07 season. Under the leadership of manager Darko Nestorović, in the 2011–12 season the club once again won the title in the First League of the Republika Srpska and won a second promotion to Premier League of Bosnia and Herzegovina. The name Radnik means worker.