In the United States, each state has its own constitution.
Usually, they are much longer than the United States Constitution, which only contains 4,543 words. State constitutions are usually longer than 8,500-words because they are more detailed regarding the day-to-day relationships between government and the people. The shortest is the Constitution of Vermont, adopted in 1793 and currently 8,295 words long. The longest is Alabama's sixth and current constitution, ratified in 1901, about 345,000 words long. Both the federal and state constitutions are organic texts: they are the fundamental blueprints for the legal and political organizations of the United States and the states, respectively.
The Tenth Amendment to the United States Constitution, part of the Bill of Rights, provides 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." The Guarantee Clause of Article 4 of the Constitution states that "The United States shall guarantee to every State in this Union a Republican Form of Government." These two provisions indicate states did not surrender their wide latitude to adopt a constitution, the fundamental documents of state law, when the U.S. Constitution was adopted.
Typically state constitutions address a wide array of issues deemed by the states to be of sufficient importance to be included in the constitution rather than in an ordinary statute. Often modeled after the federal Constitution, they outline the structure of the state government and typically establish a bill of rights, an executive branch headed by a governor (and often one or more other officials, such as a lieutenant governor and state attorney general), a state legislature, and state courts, including a state supreme court (a few states have two high courts, one for civil cases, the other for criminal cases). They also provide general governmental framework for what each branch is supposed to do and how it should go about doing it. Additionally, many other provisions may be included. Many state constitutions, unlike the federal constitution, also begin with an invocation of God.
Many states have had several constitutions over the course of their history.[ citation needed]
The territories of the United States are "organized" and, thus, self-governing if the United States Congress has passed an Organic Act. Only two of the 14 territories – Guam and the United States Virgin Islands – are organized. One unorganized territory, American Samoa, has its own constitution. The remaining 13 unorganized territories have no permanent populations and are either under direct control of the U.S. Government or operate as military bases.
The commonwealths of Puerto Rico and the Northern Mariana Islands (CNMI) do not have organic acts but operate under local constitutions. Pursuant to the acquisition of Puerto Rico under the Treaty of Paris, 1898, the relationship between Puerto Rico and the United States is controlled by Article IV of the United States Constitution. Constitutional law in the CNMI is based upon a series of constitutional documents, the most important of which are the 1976 Covenant to Establish a Commonwealth of the Northern Mariana Islands in political union with the United States of America, which controls the relationship between the CNMI and the United States ; and the local commonwealth constitution, drafted in 1976, ratified by the people of the CNMI in March 1977, accepted by the United States Government in October 1977, and effective from 9 January 1978. 
The following is a list of the current constitutions of the United States of America and its constituent political divisions. Each entry shows the original number of the current constitution, the official name of the current constitution, and the date on which the current constitution took effect.
|No.||Official name||Date of effect||Notes|
|1st||Articles of Confederation and Perpetual Union||March 1, 1781|||
|2nd||Constitution of the United States of America||March 4, 1789|
Note that constitutions of states that were independent countries prior to admission, and constitutions used by rebelling states participating in the American Civil War are not counted.
|No.||Official name||Date of effect||Notes|
|1st||Charter of the District of Columbia||December 24, 1973|
The District of Columbia has a charter similar to charters of major cities, instead of having a constitution like the states and territories. The District of Columbia Home Rule Act establishes the Council of the District of Columbia, which governs the entire district and has certain devolved powers similar to those of major cities. Congress has full authority over the district and may amend the charter and any legislation enacted by the Council. Attempts at statehood for the District of Columbia have included the drafting of two constitutions in 1982  and 1987,  both referring to the district as the "State of New Columbia".
- The Constitution of the Commonwealth of Puerto Rico, July 25, 1952. It was ratified by Puerto Rico's electorate in a referendum on March 3, 1952, approved by the United States Congress.
- The Constitution of the Commonwealth of the Northern Mariana Islands was drafted by thirty-nine elected delegates meeting in a constitutional convention on Saipan in 1976. Their proposed constitution was subsequently ratified by Northern Mariana Islands voters on March 6, 1977, and became effective January 9, 1978. Pursuant to the provisions of Section 202 of the Covenant, the Constitution of the Northern Mariana Islands was deemed to have been approved by the Government of the United States six months after the date of submission to the president. The six-month period having expired on October 22, 1977, President Carter issued a proclamation announcing the Constitution of the Northern Mariana Islands was deemed approved. 
- The Constitution of the Territory of American Samoa was signed by 68 members of the 1960 constitutional convention and was approved by United States Secretary of the Interior Fred Andrew Seaton on 27 April 1960. It became effective 17 October 1960. Several amendments to the Constitution were approved in a referendum in the general elections in 1966, subsequently by Secretary of the Interior Stewart Udall on 2 June 1967, and became effective 1 July 1967. 
- The Territory of Guam does not have its own constitution, but operates under the Guam Organic Act of 1950 and other federal statutes.
- The United States Virgin Islands, an unincorporated organized territory, does not have its own constitution, instead operating under various federal statutes. See politics of the United States Virgin Islands.
- "Covenant". June 17, 1975.
- "Proclamations". January 9, 1978.
- Despite its very different title, the United States Articles of Confederation and Perpetual Union, adopted on November 15, 1777, and ratified on March 1, 1781, was actually the first constitution of the United States of America. See Christian G. Fritz, American Sovereigns: The People and America's Constitutional Tradition Before the Civil War (Cambridge University Press, 2008) at p. 131 ISBN 978-0-521-88188-3 (noting that "Madison, along with other Americans clearly understood" the Articles of Confederation "to be the first federal Constitution.")
- Excludes the constitutions of the Kingdom of Hawaiʻi and the Republic of Hawaiʻi.
- The Wyandotte Constitution supplanted the rejected Topeka Constitution, Lecompton Constitution, and Leavenworth Constitution.
- Excludes the 1876 recodification of the Constitution of the State of Maine.
- The Constitution of the Commonwealth of Massachusetts is currently the world's oldest written constitution that is still in effect.
- The first Constitution of the State of New Hampshire, adopted on January 5, 1776, was the first written constitution for an independent state in the New World and set the stage for the United States Declaration of Independence the following summer.
- Excludes the 1938 recodification of the Constitution of the State of New York.
- Excludes the 1968 recodification of the Constitution of the Commonwealth of Pennsylvania.
- Excludes the constitution of the Republic of Texas.
- Excludes the two constitutions of the Vermont Republic.
- http://dccode.westgroup.com/toc/default.wl?oFindType=V&oDocName=DC&oDB=DC%2DST%2DWEB%3BSTADC&DocName=DC010463193&FindType=X&DB=DC-TOC-WEB%3BSTADCTOC&RS=WLW2%2E07&VR=2%2E0[ dead link]
- http://dccode.westgroup.com/Find/Default.wl?DocName=DCHINEWCOLUMBIACONSTITUTIONENACTED1987&FindType=W&DB=DC-TOC-WEB%3BSTADCTOC&RS=WLW2%2E07&VR=2%2E0[ dead link]
- "Proclamations". October 24, 1977.
- "American Samoa Constitution". October 17, 1960.
- Bryce, James, viscount. The American Commonwealth (2nd ed., rev.; London: Macmillan and Co., 1891), vol. 1, p. -445, -724, et passim.
- Hammons, Christopher W. (1999). Was James Madison wrong? Rethinking the American preference for short, framework-oriented constitutions. American Political Science Review. Dec. 1999.
- The appendices to this article contain substantial data on state constitutions.