
The Northern Boundary
Alabama's basic boundaries were shaped during North America's colonial era. In March 1663, King Charles II of England created the Carolina colony from Virginia and set the 31st parallel, now Alabama's southern boundary with Florida, as the southern limit of Carolina. In 1729, the colonies of North Carolina and South Carolina were formed from the Carolina colony, but no border was set between North Carolina and South Carolina west of the Appalachian Mountains. Later, in 1732, the Georgia colony was created entirely from South Carolina; thus, Alabama ultimately would be formed from Georgia. Finally, in 1735, the North and South Carolina colonies agreed on the 35th parallel as the border between them west of the Appalachians, thus leading to the 35th parallel as the border between western North Carolina, which later became Tennessee, and western Georgia, which later became Alabama and Mississippi.
The Northwestern "Ear"

Georgia entered the union in 1788 as a small coastal state but eagerly claimed vast new western lands extending to the Mississippi River that had been off limits to white settlers under British colonial rule. In 1789, an ambitious Georgia governor began to sell large tracts of this area, culminating in controversial sales in 1795 to four land companies of 35 million acres in present-day Mississippi and Alabama. Involving all kinds of deceit, bribery, and corruption, this debacle, known now as the Yazoo Land Fraud, ended in 1796 when a newly elected Georgia legislature rescinded the fraudulent land sales. Ultimately, Georgia yielded all claims to its former western lands to the federal government in 1802. But the two short-lived Georgia land companies, the 1789 Tennessee Yazoo Company and the 1795 Tennessee Company, apparently determined the limits of Alabama's north boundary. Their western boundary, going south from the 35th parallel, followed the Tennessee River upriver about nine miles to the mouth of Bear Creek, submerged under present-day Pickwick Lake in the twentieth century. In 1817, this previously recorded land survey feature was the apparent precedent for the Tennessee River part of the border set by Congress between the new state of Mississippi and the Alabama Territory. Thus, Alabama's "northwest ear," on the north side of the Tennessee River in the western tip of present-day Lauderdale County, originated from a traditional border between the Chickasaw and Cherokee nations, later followed by the western limits of two ephemeral Georgia land companies.
The Northeastern Corner

The Eastern Boundary—Colonial Origins

The Southern Boundary
The 1783 Treaty of Paris ending the Revolutionary War with Britain set the 31st parallel as the southern boundary of the United States. In that treaty, Britain ceded all land east of the Mississippi River to the new nation and, in a separate treaty, ceded Florida back to Spain. But because boundaries were not clearly defined, Spain and the United States wrangled for years over the northern portion of West Florida. Their 1795 Treaty of San Lorenzo finally set the 31st parallel between the Mississippi and the Chattahoochee rivers as the border between the two nations. This agreement set the stage for creating the Mississippi Territory, from which Alabama would be formed.
The Alabama/Georgia Border

The Gulf Coast "Foot"

Some 80 years later, in 1803, shrewd American diplomats negotiating the Louisiana Purchase in Paris invoked this informal 1719 agreement as the precedent for setting the Perdido River as the eastern limit of the Louisiana Purchase. Because all of Florida east of the Perdido River remained in Spanish hands until 1819, Florida's panhandle region did not become part of Alabama. After Louisiana achieved statehood in 1812, Congress added the last eastern remnant of the Louisiana Purchase, between the Pearl River in present-day Mississippi and the Perdido rivers, to the Mississippi Territory. This "Addition of 1812" ultimately became the Gulf "foot" portions of Mississippi and Alabama.
The Western Boundary

South of the Choctaw boundary line, counties in the Mississippi Territory were formed in 1803. In 1809, the northwest corner of Washington County was fixed as the point where the east-west Choctaw boundary line crossed a prehistoric Indian trail leading north out of Mobile. When Congress created the new state of Mississippi and the Alabama Territory in 1817, the northwest corner of Washington County was used as the primary reference point for setting Mississippi's eastern boundary. From this point, a line went north to the mouth of Bear Creek on the Tennessee River. South from the point, the bottom leg initially ran due south to the Gulf of Mexico and very close to the east side of Pascagoula Bay. Settlers in this area, however, protested that this vertical boundary placed them in the Alabama Territory, separating them from families and businesses on the west side of Pascagoula Bay. In 1819, when Alabama was admitted to the Union, Congress reunited all the Pascagoula settlers in Mississippi by relocating the bottom leg "to run southeastward from the northwest point of Washington County, to strike the Gulf at a point ten miles east of the mouth of the Pascagoula River."
Today, the official Great Seal of Alabama recognizes the origins of Alabama's boundaries in the histories of its neighboring states. The design of the official state seal—conceived by William Wyatt Bibb, first governor of the Alabama Territory—positively affirms this distinction. Unlike most other state seals, Alabama's features the state's outline boundary and specifically identifies its neighboring states; Tennessee, Georgia, Florida, and Mississippi.
Additional Resources
Brannon, Peter A. "The Eastern Boundary of Alabama." In The Pageant Book ... in Celebration of Alabama Home Coming Week. Edited by Peter A. Brannon et al., p. 42-48. Montgomery, Ala.: n.p., 1926.
Additional Resources
Brannon, Peter A. "The Eastern Boundary of Alabama." In The Pageant Book ... in Celebration of Alabama Home Coming Week. Edited by Peter A. Brannon et al., p. 42-48. Montgomery, Ala.: n.p., 1926.
———. "The Tennessee State Line: An Historical Interpretation." Alabama Historical Quarterly 18 (Fall 1956): 412-20.
———. "Western Boundary Line of Alabama: A Comment." Alabama Historical Quarterly 20 (Fall 1958): 571-80.
Cox, Isaac Joslin. The West Florida Controversy, 1798-1813; A Study in American Diplomacy. 1918. Reprint, Gloucester, Mass.: Baltimore: P. Smith, 1967.
Hemperley, Marion R., and Edwin L. Jackson. Georgia's Boundaries: The Shaping of a State. Athens, Ga.: Carl Vinson Institute of Government, University of Georgia, 1993.
Long, John H., ed. Alabama: Atlas of Historical County Boundaries. New York: Charles Scribner's Sons, 1996.