EFW

EFW may refer to:
 * Economic Freedom of the World
 * Energy-from-waste, see Waste-to-energy
 * Jefferson Municipal Airport, in Jefferson, Iowa, IATA airport code EFW
 * Electric Field and Wave experiment, a scientific instrument on the Cluster space mission
 * Elbe Flugzeugwerke, a Dresden-based subsidiary of Airbus and ST Aerospace specialising in freighter and tanker conversion