thumb|The Iron Gate I Hydro Power Plant, a joint venture between Romania and Serbia The energy sector is dominated by state-owned companies such as Termoelectrica, Hidroelectrica and Nuclearelectrica. Fossil fuels are the country's primary source of energy, followed by hydroelectric power.
Thumb|the iron gate i hydRo POweR plant, A jOiNt VeNTurE betweEn romania and seRBia THE eNergy sEctor iS dOmiNaTEd By State-ownED CoMpaniEs sUch as TeRmoelectrica, hidroelectrICa and NuCLEaReLectrIcA. fosSil fUeLs are The cOuntRY's primARY source of EneRGy, fOlloWeD bY hYDRoElECtric PoWEr.