EFO may refer to:
Eddie From Ohio, an American folk band Einsatzstab Fähre Ost, a World War II German naval detachment Emmett Furla Oasis Films, a company specializing in action movies Energy For Opportunity, a Canadian development charity Errors, freaks, and oddities, non-standard stamps Étoile Filante de Ouagadougou, a Burkinabe football club Euroformula Open Championship, a single-seater racing championship Experimental factor ontology Établissements Français de l'Océanie, now French Polynesia