Dia
DIA or Dia may refer to:

Government establishments
Defense Intelligence Agency, United States foreign military intelligence agency
Defence Intelligence Agency (India) Indian foreign military intelligence agency
Department of Internal Affairs, New Zealand public service department
Department of Indian Affairs, Canadian federal department
Defence Intelligence Agency (Nigeria)
Defense Intelligence Agency (South Korea)
Direzione Investigativa Antimafia, an Italian law-enforcement agency

Organizations and businesses
Airports
Davao International Airport (DVO)
Denver International Airport (DEN)
Dubai International Airport (DXB)
Doha International Airport (DIA)
Durban International Airport (DUR)
Washington Dulles International Airport (IAD)

Arts
Design Institute of Australia, Australian design organisation
Detroit Institute of Arts, American art museum
Dia Art Foundation, non-profit arts organization

Charity
Design and Industries Association, British charity

Entertainment
Dia (film), a 2020 Indian Kannada language film
DIA (group), a South Korean girl group
Dia (singer), stage name for Kim Ji-Eun, a South Korean female singer

Trade
Dia (supermarket chain), Spanish multinational supermarket chain

Youth
Detroit International Academy for Young Women
Development in Action (DiA), a youth-led UK NGO focusing on international development and global citizenship amongst young people
Sakartvelos Gogona Skautebis Asociacia 'Dia', the Georgian Girl Scout Association

Places
Diá, Drôme, France
Dia (Bithynia), an ancient town of Bithynia
Dia (Coele-Syria), an ancient city of Coele-Syria
Dia (island), Greek island off the coast of Crete
Dia, Mali
Dia (moon), a moon of Jupiter
Naxos (island), Greek island in the Aegean, named Dia by the ancient Greeks

Publications
Al Día (disambiguation), various newspapers
El Día (disambiguation), various newspapers
O Dia, Brazilian newspaper
Türkiye Diyanet Vakfı İslâm Ansiklopedisi (DİA) or İslâm Ansiklopedisi,  Turkish encyclopedia for Islamic studies
El Nuevo Dia Puerto Rican newspaper, commonly referred to as "El Dia"

Other uses
Dea Dia, lit. 'goddess Dia', a Roman goddess
Dia (mythology), name of multiple figures in Greek mythology
Dia (name), and persons with the name
Dia language, a Torricelli language of Papua New Guinea
Dia (software), a software program for diagram creation
Diameter, the width of a circle, often abbreviated to "dia."
Diamond (Shugo Chara!), also known as Dia, a character from the manga series Shugo Chara!
SS Dia, British cargo ship that sank in the Mediterranean in 1964
Dow Diamonds (NYSE: DIA), an exchange-traded fund tracking the Dow Jones Industrial Average
Document Interchange Architecture, an IBM standard for electronic mail, part of IBM  Systems Application Architecture
Data-independent acquisition, an acquisition type in mass spectrometry
Diisopropylamine, a common organic base and precursor to Lithium Diisopropylamide

See also
Diaa, a given name
Diya (disambiguation)