The human history of the west coast of North America is believed to stretch back to the arrival of the earliest people over the Bering Strait, or alternately along a now-submerged coastal plain, through the development of significant pre-Columbian cultures and population densities, to the arrival of the European explorers and colonizers. The west coast of North America today is home to some of the largest and most important companies in the world, as well as being a center of world culture.
As used in this article, the term "west coast of North America" means a contiguous region of that continent bordering the Pacific Ocean: all or parts of the U.S. states of Alaska, Washington, Oregon, and California; all or parts of British Columbia and the Yukon in Canada; all or part of the Mexican states of Baja California, Baja California Sur, Sonora, Sinaloa, Nayarit, Jalisco, Colima, Michoacán, Guerrero, Oaxaca and Chiapas; and the Central American countries of Guatemala, El Salvador, Honduras, Nicaragua, Costa Rica and Panama. The eastern Islands of the Pacific Ocean off the west coast, such as the Coastal islands of the Californias, are also important.