Guam Government US Unincorporated Territory Capital Hagatna Population 176 664 Land area 541 km² Max height above sea level 406 m EEZ 221 504 km² GDP Year 2020 Currency US dollar Languages English, Chamorro GDP per capita 34 153 USD Useful links Guam.gov: Official portal for the Island of Guam Guam Visitors Bureau Guam Economic Development Authority Pacific Community Membership 1983