|Territory of Alabama|
|Organized incorporated territory of United States|
|Government||Organized incorporated territory|
|•||1817–1819||William Wyatt Bibb|
|•||Established||December 10, 1817  1817|
|•||Statehood||December 14, 1819  1819|
The Territory of Alabama (sometimes Alabama Territory) was an organized incorporated territory of the United States. The Alabama Territory was carved from the Mississippi Territory on August 15, 1817 and lasted until December 14, 1819, when it was admitted to the Union as the twenty-second state.
The Alabama Territory [n] was designated by two interdependent Acts of the Congress of the United States on March 1 and 3, 1817,   but it did not become effective until October 10, 1817.    The delay was due to a provision in the Congressional Act which stated that the act would only take effect if and when the western part of the Mississippi Territory (1798–1817) were to form a state constitution and government on the road to statehood. A state constitution for Mississippi was adopted on August 15, 1817, elections were held in September, and the first legislative session convened in October,  with the western part of the Mississippi Territory existing since 1798 becoming the State of Mississippi on December 10, 1817. 
St. Stephens, located in the central area of the Alabama Territory on the Tombigbee River, was the only territorial capital during the period. William Wyatt Bibb (1781–1820) of Georgia was the only territorial governor, later elected to that position after statehood.
- Territories of the Kingdom of Spain and its worldwide Spanish Empire that would later become part of the future territories of Alabama:
- Possession of the Kingdom of Great Britain since 1763, in the Treaty of Paris ending the French and Indian War (1756–1763), (known as the Seven Years' War in Europe), until 1783, with the next Treaty of Paris that the lands would later be ceded to become part of the newly independent United States after 1776,
- Organized as the old Southwest Territory or Territory of the Southwest [also then occasionally known as the "Territory South of the Ohio River"] (1790–1796), then later
- Reorganized and renamed as the Mississippi Territory (1798–1817), then the
- Territory of Alabama was carved out of the eastern half in 1817 until 1819:
- West Florida, 1763–1783 (temporarily briefly possessed by Britain, acquired from Spain.
- U.S. states that ceded territorial claims that would later become part of the future State of Alabama:
U.S. territory with land that would later become part of the Territory of Alabama:
- Mississippi Territory, 1798–1817
U.S. state created from the
Alabama Territory, 1817–1819:
- State of Alabama, December 14, 1819 to present
- "An 1820 Claim to Congress: Alabama Territory: 1817"; The Intruders; TNGenNet Inc.; 2001; quick webpage: TN-537
- "An Act to enable the people of the western part of the Mississippi territory to form a constitution and state government, and for the admission of such state into the union, on an equal footing with the original state"
- "An Act to establish a separate territorial government for the eastern part of the Mississippi territory"
- "Timeline 1811-1820" (events +sources); Algis Ratnikas; "Timelines of History"; 2007; webpage: TimeLine Miss
- "Statehood Dates"; 50states.com; 1998/2009; webpage: 50s-statehood
- "Resolution for the admission of the State of Mississippi into the Union"
- "Resolution declaring the admission of the state of Alabama into the Union"
- Williams, Lewis et al.; "An 1820 Claim to Congress: Alabama Territory : 1817." Op. cit.: Gales & Seaton; American State Papers';' Washington: 1834; retrieved 21 February 2010.