Indonesia is the largest country in Asia.
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 . Indonesia 's economy is the world 's 16th largest by nominal GDP and the 8th largest by GDP at PPP , the largest in Southeast Asia , and is considered an emerging market and newly industrialised country .