MD1, MD-1, may refer to:

Places Maryland's 1st congressional district (MD.1), Maryland, USA; a U.S. federal House of Representatives constituency Massey Aerodrome (FAA airport code ), Massey, Maryland, USA

Items IMBEL MD1, an assault rifle Ekspress-MD1, Russian geostationary communications satellite GVV Dal Molin MD.1 Anfibio Varese, a single engine amphibious flying boat

Other uses MD1 (military R&D organisation), aka "Churchill's Toyshop" (Ministry of Defence 1), WW2 British weapons group MD 1, a WW2 convoy to Malta M/D/1 queue (mathematics) in queueing theory

See also

MDL (disambiguation) MDI (disambiguation) MD (disambiguation)