RGO may refer to:
Organisations Rada Główna Opiekuńcza (Central Welfare Council), a Polish social organization during the German occupation of WWI and WWII Revolutionäre Gewerkschafts Opposition (Revolutionary Union Opposition), a Communist trade union during Germany's Weimar Republic Russkoye Geograficheskoye Obshchestvo (Russian Geographical Society), a Russian scholarly association
Places Royal Greenwich Observatory (now Royal Observatory, Greenwich), Greenwich Park, London, England Orang Airport, North Hamgyong Province, North Korea (by IATA code)
Technology Reciprocating gait orthosis, a type of leg brace Reduced graphene oxide, a form of graphene Ruchnaya Granata Oboronitel'naya (Hand Grenade Defensive), a Soviet weapon