8W or 8-W may refer to:
Units of measurement 8°W, or 8th meridian west, a longitude coordinate 8 watts, a derived unit of power 8 weeks 8 wins, abbreviated in a Win–loss record
Transportation Aviation 8W, ex-IATA code for BAX Global (defunct airline) 8W, IATA code for Fly All Ways Spartan 8W Zeus, a military aircraft B-8W, a model of Bensen B-8
Rail transport 8w (locomotive), a type of locomotive under the Whyte notation B40-8W, a model of GE Dash 8-40BW locomotive C40-8W, a model of GE Dash 8-40CW locomotive C44-8W, a model of GE Dash 8-44CW locomotive
Other Tropical Depression 8W, part of the 1979 Pacific typhoon season
See also W8 (disambiguation)