Kaia or KAIA may refer to:

• Kaia (name), including a list of people with the name
• KaiA, a gene
• KAIA (group), a Filipino girl group
• KBAI (FM), radio station (91.5 FM) licensed to Blytheville, Arkansas, United States, formerly KAIA
• King Abdulaziz International Airport, Saudi Arabia's third largest airport
• The ICAO code for Alliance Municipal Airport in Nebraska, United States
• Kabul International Airport

• Caia (disambiguation)
• Kaja (disambiguation)
• Kaya (disambiguation)