Historic regions of the United States

This is a list of historic regions of the United States.

{* -indicates failed legal entities}

The Philippines was a commonwealth of the United States, 1935–1946

Worldwide location of current U. S. insular areas:

The Commonwealth of Puerto Rico

The following are state cessions made in the building of the U.S.

The following is a list of the 31 organized U.S. territories that have become states, in the order of the date organized.

The following are land grants, cessions, defined districts (official or otherwise) or named settlements made within an area that was already part of a state of the Union or U.S. territory that did not involve international treaties or Native American cessions or land purchases.

These entities were sometimes the only governmental authority in the listed areas, although they often co-existed with civil governments in scarcely populated states and territories. Civilian administered "military" tracts, districts, departments, etc., will be listed elsewhere.

During the Civil War the Department of the Pacific had six subordinate military districts:

The Department of California (1858–1861) comprised the southern part of the Department of the Pacific: California, Nevada, and southern part of Oregon Territory; merged into the Department of the Pacific as the District of California.

The Department of Oregon (1858–1861) comprised the northern part of the Department of the Pacific: Washington Territory and Oregon Territory.

These "territories" had actual, functioning governments (recognized or not):

Functioning governments created as a result of the attempted secession of the Confederacy. Some were enclaves within opposing territories:

These were regions disassociated from neighboring areas due to opposing views:

These entities have been proclaimed (or have existed de facto) in the past, but have never had an elected, recognized, or functioning government:

The unrecognized Sovereign State of Muskogee declared by William Bowles in 1799

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