Oro Province, formerly (and officially still) Northern Province, is a coastal province of Papua New Guinea. The provincial capital is Popondetta. The province covers 22,800 kmÂ², and has 176,206 inhabitants (2011 census). The province shares land borders with Morobe Province to the northwest, Central Province to the west and south, and Milne Bay Province to the southeast. The province is located within the Papuan Peninsula.