A map of the eastern United States generally includes all regions east of the Mississippi River, including the Northeast region, the Central region, the Southeast region and the Western Great Lakes region. Within these larger regions are smaller regions, such as New England and the Tri-State area in the Northeast.
The Mid-Atlantic region is loosely defined but generally includes states that straddle the Northeast and Central regions, such as Maryland, Delaware, Virginia and New Jersey. The Appalachian mountain region includes the Central region states of West Virginia, Virginia, Kentucky and parts of Pennsylvania. The Gulf of Mexico region includes the coastlines and southern sections of Florida, Alabama and Mississippi.