FK Radnicki Sremska Mitrovica (Serbian Cyrillic: ФК Раднички Сремска Митровица) is a professional football club based in Sremska Mitrovica, Vojvodina, Serbia. They compete in the Serbian First League, the second tier of the national league system.
History
The club was founded on 15 April 1922. They won the Vojvodina League in the 1966–67 season and took promotion to the Serbian League North. The club competed for two seasons in the third tier of Yugoslav football, before suffering relegation in the 1968–69 season.
After spending four seasons in the Vojvodina League West, the club finished as champions in the 2011–12 season and earned promotion to the Serbian League Vojvodina. They spent eight consecutive seasons in the third tier, placing third on two occasions. In 2020, the club was administratively promoted to the Serbian First League.