State cessions

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The state cessions are the areas of the United States that the separate states ceded to the federal government in the late 18th and early 19th centuries. The cession of these lands, which for the most part lay between the Appalachian Mountains and the Mississippi River, was key to establishing a harmonious union among the former British colonies.

The areas ceded comprise 236,825,600 acres (370,040.0 sq mi; 958,399 km²), or 10.4 percent of current United States territory, and make up all or part of 10 states.^[1] This does not include the areas later ceded by Texas to the federal government, which make up parts of five more states.