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