CAAB may refer to:

• Civil Aviation Authority of Bangladesh
• Civil Aviation Authority of Botswana
• Codes for Australian Aquatic Biota

• Dnieper-Bug Canal
• Dnieper-Bug Liman
• Dnieper-Carpathian Offensive
• Dnieper estuary
• Dnieper GES
• Dnieper reservoir
• Dnieper River Dam
• Dnieper Upland
• Dnieper–Bug estuary
• Dnieper–Carpathian Offensive
• Dniepr (Eastern) Balts
• Dnieprostroi
• Dniester Canyon
• Dniester Hills
• Dniester Hydroelectric Station
• Dniester Ovdiopol
• Dniester Ovidiopol
• Dniester region
• Dniester Republic
• Dniestr Melodies
• D. nigra
• D'ni Guilds
• DNIIT
• DNIL
• DNIM