EFN may refer to:
Businesses and organizations
Environmentalists for Nuclear, a pro-nuclear power non-profit organization EBMA Festival Network, of which the European World of Bluegrass is a member festival Education for Nature, founded by the World Wildlife Foundation on behalf of Russell E. Train , a member of the European Digital Rights advocacy group Element Fleet Management Corp. a company listed on the Toronto Stock Exchange Environmental Funders Network, cofounded by English environmentalist Ben Goldsmith European Federation of Nurses Associations, of which Beverly Malone is a member European Folk Network, a member of the European Music Council
Other uses DJ EFN (Eric Fernando Narciandi, born 1975), American disc jockey Entitlement First Nations, a group of indigenous tribes of which Mathias Colomb First Nation is one EXA Financial Network, part of EXA Infrastructure "The Experience of Fred Neech", a 2014 mixtape by American rapper Driicky Graham