The club was founded on 16 May 1926 as UD (Uzinele și Domeniile) Reșița and throughout its almost centennial history survived to many sharp ups and downs, from a national title in 1931 and a silver medal in 1932 to the last shine in the late 1990s, several reorganizations in the 2000s and an almost fatal fall at the level of amateur leagues during the 2010s.

CSM Reșița is nicknamed by fans Rosso-Nerii or Milan from Banat due to its classical red kits with black stripes.

The club was founded on 16 May 1926 from a merger between local teams Clubul Sportiv and Societatea Sportivă Muncitorească, the new team was named SS UDR (Sociatatea Sportivă a Angajaților Uzinelor de Fier și Domeniile din Reșița – "Sports Society of Employees of the Factories and Domains from Reșița"), the first coach of the team being native Ernest Loukota who also helped at the merger, the main starting 11 in the club's first year of activity being: Ștefan Czinczer – Szilágyi, Rech – Bundy, Andresz, Pecsenovszky – Grosz, Pázler, Lakatos, Adalbert Deșu, Keller.

[1] In the 1930–31 season, UDR won the Romanian West League and qualified to the national finals, where it defeated with 2–0 Societatea Gimnastică Sibiu in the final after a double scored by Eugen Lakatos, coach Loukota using the following 11: Carol Damacsek – Alexandru Pomacsek, Györi – Sinko, Sepi, Jozsef Bundi – Fibișanu, Eugen Lakatos, Silviu Ploeșteanu, Jozsef Kilianovics, Moise.

[1][2] In the following season, the club reached again the championship final, losing it with 3–0 in front of Venus București, this time coach Loukota used the following players: Carol Damacsek – Iosif Czako, Györi – Sinko, Sepi – Jozsef Bundi, Kilianovics – Tudor, Silviu Ploeșteanu, Eugen Lakatos, Moise, Keller.

The early 2000s brought financial problems to Domanului Valley and, in 2004, Reșița was dissolved and converted to FC Universitatea Craiova's reserve team.

In the summer of 2009, it was brought back to life, this time with the name of Școlar Reșița, playing in Liga III, Romania's third league.