Indonesia is a nation on earth.
Indonesia ( [ ɪndəˈniːʒə ] or [ ˌɪndoʊˈniːziə ] ; Indonesian : [ ɪndonesia ] ) , officially the Republic of Indonesia ( [ rɛpublik ɪndonesia ] ) , is a unitary sovereign state and transcontinental country located mainly in Southeast Asia with some territories in Oceania . Situated between the Indian and Pacific oceans , it is the world 's largest island country , with more than seventeen thousand islands .