Tonga Geography - 2024

Location

Oceania, archipelago in the South Pacific Ocean, about two-thirds of the way from Hawaii to New Zealand

Geographic coordinates

20 00 S, 175 00 W

Map references

Oceania

Area

total: 747 sq km

land: 717 sq km

water: 30 sq km

Area - comparative

four times the size of Washington, DC

Area comparison map:

Land boundaries

total: 0 km

Coastline

419 km

Maritime claims

territorial sea: 12 nm

exclusive economic zone: 200 nm

continental shelf: 200-m depth or to the depth of exploitation

Climate

tropical; modified by trade winds; warm season (December to May), cool season (May to December)

Terrain

mostly flat islands with limestone bedrock formed from uplifted coral formation; others have limestone overlying volcanic rock

Elevation

highest point: Kao Volcano on Kao Island 1,046 m

lowest point: Pacific Ocean 0 m

Natural resources

arable land, fish

Land use

agricultural land: 43.1% (2018 est.)

arable land: 22.2% (2018 est.)

permanent crops: 15.3% (2018 est.)

permanent pasture: 5.6% (2018 est.)

forest: 12.5% (2018 est.)

other: 44.4% (2018 est.)

Irrigated land

0 sq km (2022)

Population distribution

over two-thirds of the population lives on the island of Tongatapu; only 45 of the nation's 171 islands are occupied

Natural hazards

cyclones (October to April); earthquakes and volcanic activity on Fonuafo'ou

volcanism: moderate volcanic activity; Fonualei (180 m) has shown frequent activity in recent years, while Niuafo'ou (260 m), which last erupted in 1985, has forced evacuations; other historically active volcanoes include Late and Tofua

Geography - note

the western islands (making up the Tongan Volcanic Arch) are all of volcanic origin; the eastern islands are nonvolcanic and are composed of coral limestone and sand