Tonga may refer to the Kingdom of Tonga or the African Tonga ethnic groups:

• Kingdom of Tonga, a Pacific Island nation whose people are known as Tongans and who speak the Tongan language
• the Tonga people of Zambia and Zimbabwe, an ethnic group mainly in southern Zambia and northern Zimbabwe, with some in Mozambique, who speak the Tonga language (Bantu group M)
• the Tonga people of Malawi, an ethnic group living on the shores of Lake Malawi who speak the Tonga language (Bantu group N)

Tonga may also refer to:

• one of several concepts of Polynesian mythology:
  • the southwest wind, the last wind to be reined in by Māui.
  • the Tonga islands now home to the Kingdom of Tonga referred to above, settled by the ancestors of all Polynesians, the Lapita.
  • the name of the first woman in Tonga.
• Tonga Island, New Zealand
• in São Tomé e Príncipe, a child of a temporary immigrant.
• in India, a horse carriage: see tonga (carriage).
• a village on Nanumanga (Tuvalu): see Tonga (Tuvalu).
• a version of Intel's Pentium II microprocessor designed for laptops.
• the military codename (Operation Tonga) given to an airborne operation during the Battle of Normandy.
• the Tonga language (Mon-Khmer) spoken in Thailand and Malaysia
• a village located in Shilluk areas of southern Sudan that housed a Catholic mission station

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