A region is an area of land that has common features. A region can be defined by natural or artificial features. Language, government, or religion can define a region, as can forests, wildlife, or climate. A common way of referring to regions in the United States is grouping them into 5 regions according to their geographic position on the continent: the Northeast, Southwest, West, Southeast, and Midwest. Geographers who study regions may also find other physical or cultural similarities or differences between these areas.