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Oahu or Oahu ( in Hawaiian ), known as " The Gathering Place ", is the third largest of the Hawaiian Islands and the most populous of the islands in the U. S. state of Hawaii.
The state capital, Honolulu, is on Oahu's southeast coast.
Including small close-in offshore islands such as Ford Island and the islands in Kaneohe Bay and off the eastern ( windward ) coast, it has a total land area of, making it the 20th largest island in the United States.
In the greatest dimension, this volcanic island is long and across.
The length of the shoreline is.
The island is the result of two separate shield volcanoes:

2.117 seconds.