Last reviewed: September 2, 2026
Tonga is listed in Polynesia, within Oceania. Its capital is Nuku'alofa. This page brings together the most commonly needed identifiers and geography facts in one place, with links to related reference lists.
Where is Tonga?
For broad geographic classification, Tonga is grouped under Oceania and the subregion Polynesia. Regional labels can vary between statistical and geographic organizations, so this site uses one consistent classification for browsing rather than claiming there is only one valid convention.
What are the country codes for Tonga?
The ISO-style two-letter code shown on this page is TO, while the three-letter code is TON. Two-letter codes are especially common in software, forms and country-code domains; three-letter codes are useful where a more recognizable abbreviation is preferred. See our country code guide for context.
Borders and nearby geography
Tonga has the following land-border entries in our source dataset: No land borders listed. Island states and countries without a land frontier may show no land borders even though they have maritime neighbors.