FK Radnik Surdulica (Serbian Cyrillic: ФК Радник Сурдулица) is a professional football club based in Surdulica, Serbia. They compete in the Serbian SuperLiga, the top tier of the national league system.
The club was founded as Surdulicki sportski klub (SSK) in 1926 on the initiative of Gradimir Antic, a local shoemaker, who brought the first football ball to Surdulica. They stopped operating with the onset of World War II and Axis occupation of Serbia. In 1946, the club was reestablished as FK Polet on the initiative of Borivoje Milenkovic and Bozidar Stankovic. They subsequently changed their name to FK Hidrovlasina in 1950. Later the same year, the club merged with FK Molidben from Belo Polje and was named FK Radnik.
In July 2008, the club merged with Zeleznicar Vranjska Banja, taking its spot in the Serbian League East. They spent the next five seasons in the third tier of Serbian football. After winning the Serbian League East in 2013, the club was promoted to the Serbian First League. They spent the next two seasons in the second tier before finishing first in the 2014–15 Serbian First League and earning promotion to the Serbian SuperLiga for the first time in their history.
This page also has a version in other languages: 'Радник' Сурдулица (russian)