Death Valley, CA at -282 feet and New Orleans, LA at -8 feet. That's it! http://en.wikipedia.org/wiki/List_of_U.S._states_by_elevation
Mt. McKinley in Alaska, at about 20,320 feet (6,194 m) above sea level, is the highest point in the United States.
Colorado has the highest average altitude among the states in the US.
Badwater, California 214 ft. below sea level
Death Valley, a part of the Mojave Desert.
The mountain with the highest elevation above sea level in the United States is Denali (aka Mt. McKinley) in Alaska.
The coastal plain region of the US ranges in elevation from sea level to around 200 feet above sea level. On average, the elevation of the coastal plain region is approximately 50 feet above sea level.
The lowest point in the United States that is 282 feet below sea level is Badwater Basin in Death Valley National Park, California. It is the lowest point in North America.
Parts of the Mojave Desert in Death Valley are below sea level making it the lowest desert in the United States.
The Dead Sea is at an altitude of 423m below sea level.add The Salton Sea in US is 69m below seal level.
The west has more mountains and a higher altitude compared to the east with slight hills and at or below sea level
The Salton Sea
The tallest mountain in the contiguous U.S., is Mt. Whitney in California and its elevation is 14.505 feet above sea level.