Island Details: Guam
Number of Islands (approx.)
1*
Island Details
southernmost island in the Mariana Islands archipelago*
Type of Islands
oceanic, coral, volcanic
Surface Area (km²)
540.00*
Terrain
volcanic origin, surrounded by coral reefs; relatively flat coralline limestone plateau (source of most fresh water), with steep coastal cliffs and narrow coastal plains in north, low hills in center, mountains in south*
Highest Elevation (m)
406.0*
Highest Elevation (name)
Mount Lamlam*
Climate Risk Index Rank (1993-2012)
21*
Mean Sea Level Trends (mm/year)
5.37*
Mean Sea Level (meta)
Time span: 1993-2025; Completeness: ??%; Station ID: 1630000*
Population (total)
153,836*
Census Year [Population (total)]
2020*
Population Density (p/km²)
284.9*
Census Year [Population Density (p/km²)]
2020*
Population Growth (annual %)
0.800*
Census Year [Population Growth (annual %)]
2024*
GDP (per capita in current US$)
41,833*
Dominant Economic Sector
tourism, US national defense spending*
Administration
dependent (unincorporated territory of the US)*
Miscellaneous
The military installation on the island is one of the most strategically important US bases in the Pacific - largest and southernmost island in the Mariana Islands archipelago*
