MDW could refer to:
59th Medical Wing, a U.S. Air Force medical wing, Joint Base San Antonio, Texas, U.S. Midway International Airport (IATA Airport Code), Chicago, Illinois, U.S. United States Army Military District of Washington Milwaukee District West Line (MDW), a Metra commuter rail line in Chicago, Illinois, U.S. Minnesota, Dakota and Western Railway, U.S. and Canada University of Music and Performing Arts Vienna (), a music university in Vienna, Austria Maidstone West railway station An abbreviation for meadow, usually in a street name (as in Castle Mdw in Norwich).