CIA is the Central Intelligence Agency, the national foreign intelligence agency of the United States.

CIA, cia, or Cia may also refer to:

• Chennai International Airport, Tamil Nadu, India
• Clark International Airport, Pampanga, Philippines
• Coimbatore International Airport, Tamil Nadu, India
• Rome Ciampino Airport, Italy (IATA code: CIA)

• C.I.A. (band), an American hip-hop group
• CIA (TV series), an American television series
• Cambala Investigation Agency, an Indian television series
• Comrade in America, a 2017 film directed by Amal Neerad
• "The CIA", a 2023 song by Glass Beach from the album Plastic Death

• Cleveland Institute of Art, an art school in Ohio, United States
• The Art Institute of Colorado, a former institution in Denver, United States
• The Culinary Institute of America, a private culinary school in New York, United States

• Central India Agency, a former political agency of the British Raj
• California Institute of Abnormalarts, a nightclub in North Hollywood, United States
• CAN in Automation, a Controller Area Network organization
• Canadian Institute of Actuaries, a Canadian professional body
• Chemical Industries Association, an organization in the United Kingdom
• Chilkoot Indian Association, a federally recognized Native American tribe in Alaska
• Creators of Intense Art, a computer art organization

• CIA triad (confidentiality, integrity, and availability), in information security
• MOS Technology CIA, an integrated circuit

• Cardiff International Arena, an indoor arena in Cardiff, Wales
• Certified Internal Auditor, a professional designation from the Institute of Internal Auditors
• Cia-Cia language (ISO 639-3 code: cia)

• Sia (disambiguation)
• Chia (disambiguation)
• All pages with titles beginning with CIA
• All pages with titles containing CIA