The designation East Pacific refers to the portion of the Pacific Ocean nearest to the Americas. There appears to be no single official definition of the term. However, its western boundary is generally taken to be the ±180° meridian. Thus the East Pacific lies in the Western Hemisphere. World map showing the Americas CIA political map of the Americas The Americas are the lands of the Western hemisphere or New World consisting of the continents of North America[1] and South America with their associated islands and regions. ... The geographical western hemisphere of Earth, highlighted in yellow. ...