CSO Plopeni is a Romanian football team based in the town of Plopeni, Prahova County. The club competes in the Romanian Liga III, the third tier of the nation's football pyramid, where they face off against other semi-professional sides from across the country. Their home ground is the local Stadionul Plopeni. Founded with the aim of representing the town, CSO Plopeni has navigated the challenges of lower-league football for decades. The team has experienced fluctuating fortunes, with seasons spent battling for promotion to Liga II and others focused on consolidation. Key eras have seen local heroes emerge and memorable cup victories against higher-division opponents. In the modern era, the club focuses on a blend of experienced campaigners and promising youth, striving for consistency in a competitive league. The supporters, known for their passionate backing, create a formidable home atmosphere. CSO Plopeni remains a cornerstone of the local community, embodying the resilient spirit of Romanian football beyond the top flight.