Østfold Energi is a Norwegian power company that operates hydroelectric power plants in Østfold and Sogn og Fjordane with an annual power production of 1 680 TW·h-year. The power plants operated by Østfold Energi are Borgund power plant (1013 GWh-year) Stuvane power plant (165 GW·h-yr) Nyset-Steggje power plant (449 GW·h-yr) Brekke power plant (30 GW·h-yr) Tistedalsfoss power plant (16.3% of 13 GW·h-yr) and Ørje power plant (9 GW·h-yr).
Key people are Egil Martin Ullebø (Chairman) and Rolf Mogens Gjermundsen (CEO).