Political divisions of the United States

United States, political divisions

Political divisions of the United States or administrative divisions of the United States are the various governing entities that together form the United States. The first subdivision of the United States, meaning the union of states, is the state. The admission of sovereign states into the United States, i.e., the union of states, beyond the original thirteen states, is authorized under Article IV, Section 3, of the Constitution for the United States of America.[1] Most of the states admitted to the union after the original 13 have been formed within territories of the United States (that is, land under the sovereignty of the federal government but not part of any state) that were organized by an act or resolution of the United States Congress, subject to the Congress' plenary powers under the territorial clause of Article IV, sec. 3, of the Constitution for the United States of America.[1]

State governments within the United States may enact their own laws and prosecute crimes pursuant thereto. Member states of the United States are then typically subdivided into counties. Louisiana uses the term parish and Alaska uses the term borough for what the Census terms county-equivalents in those states.

Territories, except the Minor Outlying Islands, are subdivided into municipalities. Guam uses the term Village and the U.S. Virgin Islands uses the term Districts, American Samoa uses the terms district and Unorganized atolls.

While not explicitly part of the U.S.'s political divisional makeup, as Associated States, the Federated States of Micronesia and Palau are divided into states (States of Micronesia and States of Palau). The Marshall Islands is divided into atolls and islands. While Micronesia is a federation, Palau and the Marshall Islands are both unitary states.

Each Indian Reservation is subdivided in various ways. For example, the Navajo Nation is subdivided into agencies and Chapter houses. While the Blackfeet Nation is subdivided into Communities.

Counties and county equivalents may be further subdivided into townships. Towns in New York, Wisconsin and New England are treated as equivalents to townships by the United States Census Bureau. Towns or townships are used as subdivisions of a county in 20 states, mostly in the Northeast and Midwest.[2]

Population centers may be organized into incorporated cities, towns, villages, and other types of municipalities. Municipalities are typically subordinate to a county government, with some exceptions. Certain cities, for example, have consolidated with their county government as consolidated city-counties. In Virginia, cities are completely independent from the county in which they would otherwise be a part. In some states, particularly in New England, towns form the primary unit of local government below the state level, in some cases eliminating the need for county government entirely.

Other divisions include the federal district, insular areas administered by the Federal government, and American Indian reservations. The Federal government also maintains exclusive jurisdiction over military installations and American embassies and consulates located in foreign countries. Other special purpose divisions exist separately from those for general governance, examples of which include conservation districts and Congressional districts.

States and their subdivisions


The primary political unit of the United States is the state. According to numerous decisions of the United States Supreme Court, the 50 individual states and the United States as a whole are each sovereign jurisdictions.[3] The 13 original states Thirteen Colonies declared independence from the British Empire in 1776. In 1777, they established a collective government under the Articles of Confederation. The Constitution for the United States of America superseded the Articles in 1789 in the sense that it established and superimposed a consolidated political government over the confederated union of geographical states. The Constitution for the United States of America establishes the political government for the Federal government of the United States, which includes, among other things, judicial review,[4] power to regulate citizenship,[5][6] power to coin money,[5] power to regulate commerce with foreign nations, and among the several states,[5] conduct foreign policy, and to make all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this Constitution in the government of the United States, or in any department or officer thereof.[5]

The idea of "dual sovereignty" or "separate sovereigns" is derived from the Tenth Amendment to the Constitution, which states that "the powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people."[7]

The United States Supreme Court in Texas v. White held that political states do not have the right to secede, though it did allow some possibility of the divisibility "through revolution, or through consent of the States."[8][9]

Four states (Massachusetts, Pennsylvania, Virginia, and Kentucky) call themselves "commonwealths." The word commonwealth in this context refers to the common "wealth", or welfare, of the public.[10] The term has no legal impact.[11]

While state governments within the United States may enact their own laws and prosecute crimes pursuant thereto,[7] they are not sovereign in the Westphalian sense in international law which says that each State has sovereignty over its territory and domestic affairs, to the exclusion of all external powers, on the principle of non-interference in another State's domestic affairs, and that each State (no matter how large or small) is equal in international law.[12] Additionally, the member states of the United States do not possess international legal sovereignty, meaning that they are not recognized by other sovereign States such as, for example, France, Germany or the United Kingdom,[12] nor do they possess full interdependence sovereignty, meaning that they cannot control movement of persons across state borders.[12]

The 50 states of the United States of America are as follows (this list includes both the postal code abbreviation and the traditional abbreviation for each state):

Map of United States with state border lines. Note that Alaska and Hawaii are shown at different scales and that the Aleutian Islands and the uninhabited northwestern Hawaiian Islands are omitted from this map.

The 50 states can be divided into regions in many different ways.


The states are divided into smaller administrative regions, called counties in all but two states. The exceptions are Alaska where main subdivisions is the boroughs (parts of the state are not included in any borough, called the Unorganized Borough, is divided into "census areas"), and Louisiana (which is divided into county-equivalents that are called parishes). Counties have varying degrees of political and legal significance. In some states, mainly in New England, they are primarily used as judicial districts. In other states, counties have broad powers in housing, education, transportation and recreation.

Counties may contain a number of cities, towns, villages, or hamlets, or sometimes just a part of a city. Some cities are consolidated with, and coterminous with, their counties, including Philadelphia, Honolulu, San Francisco, Nashville, and Denver—that is to say, these counties consist in their entirety of a single municipality the government of which also operates as the county government. Some counties, such as Arlington County, Virginia, do not have any additional subdivisions. Some states contain independent cities that are not part of any county. New York City is coterminous with five counties.

Towns and townships

Towns and townships are subdivisions of counties in many states. States not having such subdivisions may divide counties into other minor civil divisions. The terms "township" and "town" are closely related (in many historical documents the terms are used interchangeably). However, the powers granted to towns or townships vary considerably from state to state. In New England, towns are a principal form of local government, providing many of the functions of counties in other states. In California, by contrast, the pertinent statutes of the Government Code clarify that "town" is simply another word for "city", especially a general law city as distinct from a charter city. Also, in some states, large areas have no general-purpose local government below the county level.

Some townships or other minor civil divisions have governments and political power; others are simply geographic designations. Townships in many states are generally the product of the Public Land Survey System. For more information, see survey township and civil township.


There are approximately 30,000 incorporated cities in the United States, with varying degrees of self-rule.

Other subdivisions

In Michigan, the state universities are constitutionally autonomous jurisdictions, possessed of a special status somewhat equivalent to that of metropolitan municipality. That is, as bodies corporate, they operate as though they were municipalities, but they have autonomy from legislative and executive control. Each university has a board which is the sole legislative body for the campuses they control. These campuses are independent of all state laws, and under the sole control of the boards. The boards are responsible for all public services, e.g. policing, and fire protection.[13] They often contract with the city they are located in for these services, but all have their own police departments.

Federal oversight of United States territory

Congress of the United States

Article IV, Section 3 of the Constitution for the United States of America defines the extent of the authority that the U.S. Congress exercises over the territory of the United States:

New States may be admitted by the Congress into this Union; but no new State shall be formed or erected within the Jurisdiction of any other State; nor any State be formed by the Junction of two or more States, or Parts of States, without the Consent of the Legislatures of the States concerned as well as of the Congress.
The Congress shall have Power to dispose of and make all needful Rules and Regulations respecting the Territory or other Property belonging to the United States; and nothing in this Constitution shall be so construed as to Prejudice any Claims of the United States, or of any particular State.

The power of Congress over territorial divisions that are not part of one of the states is exclusive and universal. Once a territory becomes a state of the Union, the state must consent to any changes pertaining to the jurisdiction of that state. The only potential violation of this occurred when the legislature of Virginia declared the secession of Virginia from the United States at the start of the American Civil War and a newly formed alternative Virginia legislature, recognized by the federal government, consented to have West Virginia secede from Virginia.

United States Department of the Interior

On March 3, 1849, the last day of the 30th Congress, a bill was passed to create the U.S. Department of the Interior to take charge of the internal affairs of United States territory. The Interior Department has a wide range of responsibilities (which include the regulation of territorial governments, the basic responsibilities for public lands, and other various duties).

In contrast to similarly named Departments in other countries, the United States Department of the Interior is not responsible for local government or for civil administration except in the cases of Indian reservations, through the Bureau of Indian Affairs (BIA), and island dependencies, through the Office of Insular Affairs (OIA).

Other federal oversight

The federal government also exercises exclusive jurisdiction over overseas military installations and American embassies and consulates located in foreign countries. It exercises concurrent jurisdiction to varying degrees with the states in many domestic federal enclaves.

Jurisdictions not administered by the states

District of Columbia

Main article: District of Columbia

A separate federal district, the District of Columbia (DC), which is under the direct authority of Congress, was formed from land ceded to the Federal Government by the states of Maryland and Virginia; however, the territory ceded by Virginia was returned to that state in 1846. The District does not form part of any state and the United States Congress exercises "exclusive jurisdiction in all cases whatsoever", over the city; however, the District of Columbia Home Rule Act provides for limited home rule, including an elected mayor and city council. Residents of the District can vote in presidential elections, as the Twenty-third Amendment to the United States Constitution grants the District three electors in the Electoral College.

Insular areas

The insular areas of the United States are those jurisdictions that are neither a part of one of the 50 states nor the federal district.[14] Unlike within the States, sovereignty over insular areas rests not with the local people, but in Congress. In most cases, however, Congress has granted considerable self-rule through an Organic Act, which functions as a local constitution. Insular areas are administered by the Federal Government through the Department of the Interior's Office of Insular Affairs.

The insular areas include a number of territories under the sovereignty of the United States and three sovereign nations in free association with the United States. Territories incorporated within the provisions of the Constitution for the United States of America are designated incorporated territories. Territories not so incorporated are designated "unincorporated". Territories may also be organized, if granted by an Organic Act of Congress or unorganized (without direct authorization of self-government by such an act).

The Northwest Ordinance grants territories the right to send a non-voting delegate to the U.S. Congress. Since the organization of the Northwest Territory in 1789, all areas not admitted to the United States as States were under the direct control of Congress as organized incorporated territories, with some political autonomy at the local level. These organized incorporated territories subsequently became states. Thirty-one of the current 50 states were organized incorporated territories before their admission to the Union. Since the admission of Hawaii to the Union in 1959, there has been a single incorporated territory, the uninhabited Palmyra Atoll (formerly part of the Hawaii Territory, but excluded from the act of admission).

The unincorporated territories of the United States and their ISO 3166-1 codes (in parentheses) are as follows:

Along with Palmyra Atoll, the following uninhabited territories form the United States Minor Outlying Islands (UM):

In addition to the territories noted above, the United States administered the Trust Territory of the Pacific Islands from July 18, 1947 until October 1, 1994. The trust territory was subsequently divided into four political entities—the Northern Mariana Islands, listed above, and three freely-associated states with which the United States has entered into the Compact of Free Association (ISO 3166-1 codes in parentheses):

Cuba and the Philippines are two additional former unincorporated territories that are now independent countries. The United States Navy has held the Guantanamo Bay Naval Base in a portion of Guantánamo Bay, Cuba, since 1898. The United States government possesses a lease to this land, which only mutual agreement or United States abandonment of the area can terminate. The present Cuban government of Raúl Castro disputes this arrangement, claiming Cuba was not truly sovereign at the time of the signing. The United States argues this point is irrelevant because Cuba apparently ratified the lease post-revolution, and with full sovereignty, when it cashed one rent check in accordance with the disputed treaty.

The United States government is part of several international disputes over the disposition of certain maritime and insular sovereignties, some of which would be considered territories. Bajo Nuevo Bank and Serranilla Bank are two such disputed claims. See International territorial disputes of the United States for more information.

The United States also holds several other territories, districts, and possessions, notably the federal district of the District of Columbia, and several overseas insular areas, the most significant of which are American Samoa, Guam, the Northern Mariana Islands, Puerto Rico, and the United States Virgin Islands. Islands gained by the United States in the war against Spain at the turn of the 20th century under the control of the federal government is considered part of the "United States" for purposes of law;[15] on the other hand, the United States Supreme Court declared in a series of opinions known as the Insular Cases that the Constitution extended ex proprio vigore to the territories. However, the Court in these cases also established the doctrine of territorial incorporation. Under the same, the Constitution only applied fully in incorporated territories such as Alaska and Hawaii, whereas it only applied partially in the new unincorporated territories of Puerto Rico, Guam and the Philippines.[16][17]

The Northern Marianas Islands is a territory which are commonwealths associated with the United States. They might some day advance to statehood, or they might become independent—as did the Philippines in 1946, after it was a commonwealth of the United States for many years. A territory—whether "organized" or "unorganized"—has significantly fewer rights in the grand scheme of things than a commonwealth (let alone a state), but it ranks at least a notch above "possessions" such as Wake Island, which has no permanent population and thus does not require even a simple territorial government.

American Indian reservations

Main article: Indian reservation

American Indian reservations are areas of land managed by an American Indian tribe under the United States Department of the Interior's Bureau of Indian Affairs. There are about 310 Indian reservations in the United States. Tribes possess limited tribal sovereignty over the land in their reservation. As a result, laws on tribal lands may vary from the surrounding area.[18] The tribal council, not the county or state government, generally has jurisdiction over reservations. Different reservations have different systems of government, which may or may not replicate the forms of government found outside the reservation. Most Indian reservations were established by the federal government; a limited number, mainly in the East, owe their origin to state recognition.[19]

Residents of a reservation may vote as residents of a state and are required to pay federal taxes. The special status of reservations has created both opportunities (such as gambling in states that normally disallow it) and challenges (such as the unwillingness of some companies to do business in an area where they are not certain what laws will apply to them).

Other defined areas

In addition to general-purpose government entities legislating at the state, county, and city level, special-purpose areas may exist as well. Conservation districts are one such type of special purpose area, created for the purpose of conserving land, natural scenery, flora, and fauna.

Congressional districts are another example, formed for the purpose of electing members to the United States Congress.

Additionally, U.S. courts have ruled that there are smaller areas which are to be considered as fulfilling government functions, and should therefore be bound by the same restrictions placed on "traditional" (US-aligned) government bodies. These include homeowners associations (determined in Shelley v. Kraemer, Loren v. Sasser, Committee for a Better Twin Rivers v. Twin Rivers Homeowners' Association), and company-owned towns (both for employees and for consumers, decided in the USSC case Marsh v. Alabama in 1946). Many homeowners' and neighborhood associations are considered non-profit organizations, but have the ability to raise taxes or fees, fine members for infractions against association-rules, and initiate lawsuits. The question of civil rights in such communities has not yet been conclusively determined, and varies from state to state.

See also


  1. 1 2 "Constitution for the United States of America, Article IV, Section 3, Paragraph 1". Legal Information Institute, Cornell University Law School. Retrieved 17 October 2015.
  2. 2002 Census of Governments, Individual State Descriptions (PDF)
  3. Radan, 2007, p. 12
  4. "Constitution for the United States of America, Article III". Legal Information Institute, Cornell University Law School. Retrieved 17 October 2015.
  5. 1 2 3 4 "Constitution for the United States of America, Article I, Section 8". Legal Information Institute, Cornell University Law School. Retrieved 17 October 2015.
  6. "Constitution of the United States, Amendment XIV". Legal Information Institute, Cornell University Law School. Retrieved 17 October 2015.
  7. 1 2 "Constitution for the United States of America, Amendment X". Legal Information Institute, Cornell University Law School. Retrieved 17 October 2015. The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.
  8. Radan, 2007, p. 222
  9. Texas v. White, 74 U.S. 700 (1868) at Cornell University Law School Supreme Court collection.
  10. The American Heritage Dictionary of the English Language, Fourth Edition, 2000.
  11. See "Commonwealth", The Columbia Encyclopedia, Sixth Edition, 2001–07.
  12. 1 2 3 Krasner, Professor Stephen D. (2001). Problematic Sovereignty: Contested Rules and Political Possibilities. pp. 6–12. ISBN 9780231121798.
  13. Public Sector Consultants Inc. (2003). "MICHIGAN'S HIGHER EDUCATION SYSTEM: A Guide for State Policymakers" (PDF). Ferris State University.
  14. Archived April 10, 2010, at the Wayback Machine.
  15. See 8 U.S.C. § 1101(a)(36) and 8 U.S.C. § 1101(a)(38) Providing the term "State" and "United States" definitions on the U.S. Federal Code, Immigration and Nationality Act. 8 U.S.C. § 1101a
  16. CONSEJO DE SALUD PLAYA DE PONCE v JOHNNY RULLAN, SECRETARY OF HEALTH OF THE COMMONWEALTH OF PUERTO RICO Page 6 and 7 (PDF), The United States District Court for the District of Puerto Rico, retrieved 4 February 2010
  17. The Insular Cases: The Establishment of a Regime of Political Apartheid" (2007) Juan R. Torruella (PDF), retrieved 5 February 2010
  18. Wade Davies and Richmond L. Clow, American Indian Sovereignty and Law: An Annotated Bibliography (Lanham, MD: Scarecrow Press, 2009).
  19. Veronica E. Velarde Tiller, ed., Tiller's Guide to Indian Country: Economic Profiles of American Indian Reservations (Albuquerque: BowArrow Pub., 1996/2005)


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