EFO

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