| Area | 748 sq km, 289 sq mi (total) 717 sq km, 277 sq mi (land) |
| Capital | Nuku'alofa |
| Largest city | Nuku'alofa (23,700 in 2006) |
| Other large cities | main towns, not cities: Mu’a (4,900) & Haveloloto (3,400) on Tongatapu; Neiafu (4,300) on Vava’u; Pangai (1,700) on Lifuka in the Ha’apai group of islands; Ohonua (1,300) on Eua. |
| Climate | tropical, modified by Trade Winds |
| Time Difference | GMT plus 13 hours |