| Ground: | Municipal Stadium |
| Capacity: | 2,586 |
| Season: | 2023–24 |
| Clubname: | MKS Kluczbork |
| Upright: | 0.7 |
| Fullname: | Miejski Klub Sportowy w Kluczborku |
| Chairman: | Waldemar Sosin[1] |
| Manager: | Łukasz Ganowicz |
| League: | III liga, group III |
| Position: | III liga, group III, 3rd of 18[2] |
| Website: | http://www.mkskluczbork.pl |
| Pattern Name1: | Traditional |
| Leftarm1: | 0000CD |
| Body1: | FFFFFF |
| Rightarm1: | 0000CD |
| Shorts1: | 0000CD |
| Socks1: | FFFFFF |
MKS Kluczbork is a football club based in Kluczbork, Opole Voivodeship, Poland. They compete in group III of the III liga, the fourth tier of the national football league system.
The club was founded in 2003 as the merger of three local clubs: KKS Kluczbork (itself a result of merger in 1945 between ZKK Kluczbork and Cresovia Kluczbork), LKS Kuniów and the local inter-school sports organisation. The club itself, although founded recently, relates to the town's very rich footballing history, inheriting the stadium and facilities of the previous most successful Kluczbork club Metal Kluczbork.
In the 2008–09 season, MKS won the Western group of the third division, and were consequently promoted to the I liga for the 2009–10 season.[3]
They reached the 1/8th of the Polish Cup in the 2011–12 season, eventually losing 1–0 to Ruch Zdzieszowice[4]