MDQ

MDQ may refer to:

• Astor Piazzolla International Airport (IATA designator MDQ), Mar del Plata in Argentina
• Mbole language (ISO 639:mdq), a Bantu language of the Democratic Republic of the Congo
• Mood Disorder Questionnaire, a self-report questionnaire designed to help detect bipolar disorder
• Mother's Day Quarry, a Diplodocus fossil site in Montana
• Quito Metro (in Spanish, Metro de Quito), a Metro system that opened in the Ecuadorian capital in 2023