16 September 1975 (from the Australian-administered UN trusteeship)
28 November 1960 (from France)
Religions
Roman Catholic 27%, Evangelical Lutheran 19.5%, United Church 11.5%, Seventh-Day Adventist 10%, Pentecostal 8.6%, Evangelical Alliance 5.2%, Anglican 3.2%, Baptist 2.5%, other Protestant 8.9%, Bahai 0.3%, indigenous beliefs and other 3.3% (2000 census)
Muslim 100%
Languages
Melanesian Pidgin serves as the lingua franca, English spoken by 1%-2%, Motu spoken in Papua region note: 820 indigenous languages spoken (over one-tenth of the world's total)
Arabic (official and national), Pulaar, Soninke, Wolof (all national languages), French, Hassaniya