Atoll or ATOLL can refer to:

• Atoll, a type of island
• Atolls of the Maldives
• the ATOLL programming language
• ATOLL, a floating oceanographic laboratory
• the NATO reporting name for the Soviet/Russian Vympel K-13 air-to-air missile
• in the 1995 movie Waterworld, atolls (pronounced A-toll) are large floating constructs in water, on which humans live
• Atoll Electronique, a French audio electronics company.
• Atoll, a French progressive rock band.
• Atoll GmbH, a German Screening Process Chromatography Media Company.