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Map of USA with state names WLM.svg; Map of USA with state names as.svg; United States Hockey League locations.svg; Map of States in the USA by the status of taxation on digital goods.svg; USA States Map - Educational.svg; SVG development
Wikipedia talk:WikiProject United States/Assessment; Wikipedia talk:WikiProject United States/Collaboration; File talk:Map of USA with state names 2.svg; Template:Fossiliferous stratigraphic units in the United States map; Template:National Register Of Historic Places Map; Template:Paleontology in the United States map; Template:USA image map ...
Ecoregions of North America, featuring the 50 United States, the District of Columbia and the five inhabited territories. The following is a list of ecoregions in the United States as identified by the World Wide Fund for Nature (WWF). The United States is a megadiverse country with a high level of endemism across a wide variety of ecosystems.
In the United States, the EPA and the United States Geological Survey (USGS) are the principal federal agencies working with the CEC to define and map ecoregions. Ecoregions may be identified by similarities in geology , physiography , vegetation , climate , soils , land use , wildlife distributions, and hydrology .
The United States of America is a federal republic [1] consisting of 50 states, a federal district (Washington, D.C., the capital city of the United States), five major territories, and various minor islands. [2] [3] Both the states and the United States as a whole are each sovereign jurisdictions. [4]
U.S. Census Bureau regions and divisions. Since 1950, the United States Census Bureau defines four statistical regions, with nine divisions. [1] [2] The Census Bureau region definition is "widely used... for data collection and analysis", [3] and is the most commonly used classification system.