[[Delwedd:Agaña Montage.png|250px|iawn|bawd|Y ddinas o Hagåtña.]]
Mae '''Hagåtña''' (ynganiadPrifddinas [[TsiamoregGwam]]:, un o diriogaethau tramor ''[hæˈɡɑtɲæ[Unol Daleithiau America]]''), neuyw '''AgañaHagåtña''' yn(ynganiad [[SbaenegTsiamoreg]] (a gynt yn: [[Saesneg]hæˈɡɑtɲæ]),yw'r("Agana" prifddinascynt). [[Gwam]]. Mae'n llai na'r anheddiad mwyaf yn Gwam ([[Dededo]]). Mae'r poblogaeth tua 10001,000.<ref name=census>{{cite web |url= http://bsp.guam.gov/GU%20Statistical%20Yearbook_2010.pdf |title= 2010 Guam Statistical Yearbook |access-date= 2014-04-26 |archive-url= https://web.archive.org/web/20140723215811/http://bsp.guam.gov/GU%20Statistical%20Yearbook_2010.pdf |archive-date= 2014-07-23 |url-status= dead }} {{small|(4.3 [[Megabyte|MB]])}}, (rev. 2011)</ref>