Title: Oceania
Content:  Oceania was originally conceived as the lands of the Pacific Ocean, stretching from the Strait of Malacca to the coast of the Americas. It comprised four regions: Polynesia, Micronesia, Malaysia (now called the Malay Archipelago), and Melanesia. Today, parts of three geological continents are included in the term "Oceania": Eurasia, Australia, and Zealandia, as well the non-continental volcanic islands of the Philippines, Wallacea, and the open Pacific. Oceania extends to New Guinea in the west, the Bonin Islands in the northwest, the Hawaiian Islands in the northeast, Rapa Nui and Sala y Gómez Island in the east, and Macquarie Island in the south. Not included are the Pacific islands of Taiwan, the Ryukyu Islands, and the Japanese archipelago, all on the margins 
Title: Outline of Oceania
Content:   The following outline is provided as an overview and topical guide to Oceania. Oceania is a geographical, and geopolitical, region consisting of numerous lands—mostly islands in the Pacific Ocean and vicinity. The term is also sometimes used to denote a continent comprising Australia and proximate Pacific islands. The boundaries of Oceania are defined in a number of ways. Most definitions include parts of Australasia such as Australia, New Zealand, and New Guinea, and parts of Maritime Southeast Asia. Ethnologically, the islands of Oceania are divided into the subregions of Melanesia, Micronesia, and Polynesia.
Title: History of Oceania
Content:  The History of Oceania includes the history of Australia, New Zealand, Hawaii, Papua New Guinea, Fiji and other Pacific island nations.
Title: Oceania
Content: In the UN's geopolitical conception used by the International Olympic Committee, and by many atlases, Oceania includes Australia and the nations of the Pacific from Papua New Guinea east, but not Indonesian New Guinea.  Definitions of Oceania vary; however, the islands at the geographic extremes of Oceania are generally considered to be the Bonin Islands, a politically integral part of Japan; Hawaii, a state of the United States; Clipperton Island, a possession of France; the Juan Fernández Islands, belonging to Chile; and Macquarie Island, belonging to Australia. (The United Nations has its own geopolitical definition of Oceania, but this consists of discrete political entities, and so excludes the Bonin Islands, Hawaii, Clipperton Island, and the Juan Fernández Islands, along with Easter Island.) The geographer Conrad Malte-Brun coined the French expression Terres océaniques (Oceanic lands) c. undefined 1804. 
Title: Demographics of Oceania
Content:  Oceania is a region centered on the islands of the tropical Pacific Ocean. Conceptions of what constitutes Oceania vary, with it being defined in various ways, often geopolitically or geographically. In the geopolitical conception used by the United Nations, International Olympic Committee, and many atlases, the Oceanic region includes Australia and the nations of the Pacific from Papua New Guinea east, but not the Malay Archipelago or Indonesian New Guinea. The term is sometimes used more specifically to denote Australasia as a geographic continent, or biogeographically as a synonym for either the Australasian realm (Wallacea and Australasia) or the Oceanian realm (Melanesia, Polynesia, and Micronesia apart either from New Zealand or from mainland New Guinea ). Although Christmas Island and the Cocos (Keeling) Islands belong to the Commonwealth of Australia and are inhabited, they are nearer Indonesia than the Australian mainland, and are commonly associated with Asia instead of Oceania.
Title: List of sovereign states and dependent territories in Oceania
Content:   This is a list of sovereign states and dependent territories in the geopolitical region of Oceania. Although it is mostly ocean and spans many continental plates, Oceania is occasionally listed as one of the continents. This list follows the boundaries of geopolitical Oceania, which includes Australasia, Melanesia, Micronesia, and Polynesia. The main continental landmass of Oceania is Australia. The boundary between Asia and Oceania is not clearly defined. For political reasons, the United Nations considers the boundary between the two regions to be the Indonesian–Papua New Guinean border. Papua New Guinea is occasionally considered Asian as it neighbours Indonesia, but this is rare, and it is generally accepted to be part of Oceania. Geographically, Papua and West Papua provinces are parts of Oceania.
Title: List of indigenous peoples
Content:  Oceania includes most islands of the Pacific Ocean, New Guinea, New Zealand and the continent of Australia. List of peoples by geographical and ethnolinguistic grouping:
Title: Oceania Hockey Federation
Content: 🇦🇺 Australia ; 🇫🇯 Fiji ; 🇳🇿 New Zealand ; 🇵🇬 Papua New Guinea ; 🇼🇸 Samoa ; 🇸🇧 Solomon Islands ; 🇹🇴 Tonga ; 🇻🇺 Vanuatu 
Title: Oceania
Content:  Oceania is a geographic region that includes Australasia, Melanesia, Micronesia and Polynesia. Spanning the Eastern and Western Hemispheres, Oceania has a land area of 8,525,989 km2 and a population of over 41 million. When compared with the continents, the region of Oceania is the smallest in land area and the second smallest in population after Antarctica. Oceania has a diverse mix of economies from the highly developed and globally competitive financial markets of Australia, New Caledonia, New Zealand, French Polynesia and Hawaii, which rank high in quality of life and human development index, to the much less developed economies such as Papua New Guinea, Indonesian New Guinea, Kiribati, Vanuatu and Tuvalu, while also including medium-sized 
Title: List of predecessors of sovereign states in Oceania
Content:  This is a list of all present sovereign states in Oceania and their predecessors. The region of Oceania is generally defined geographically to include the subregions of Australasia, Melanesia, Micronesia and Polynesia, and their respective sovereign states. Oceania was originally colonised by Europeans with Australia and New Zealand primarily by the British, and the Pacific Islands primarily by the British, French and Dutch. Today, Oceania consists of fourteen sovereign states of various government types, the most common consisting of parliamentary systems.

Question: what countries included in oceania?
Answer: Northern Mariana Islands.