Katana VentraIP

Southeastern United States

The Southeastern United States, also referred to as the American Southeast, the Southeast, or the South, is a geographical region of the United States located in the eastern portion of the Southern United States and the southern portion of the Eastern United States. The region includes a core of states that reaches north to Maryland and West Virginia, bordering the Ohio River and Mason–Dixon line, and stretches west to Arkansas and Louisiana.[note 2]

Not to be confused with Southern United States.

Southeastern United States

580,835 sq mi (1,504,360 km2)

540,511 sq mi (1,399,920 km2)

40,324 sq mi (104,440 km2)  6.9%

97,438,243 [note 1]

150.5/sq mi (58.1/km2)

EST (UTC-5)/CST (UTC-6);
AST (UTC-4) in PR and VI

EDT (UTC-4)/CDT (UTC-5);
No DST in PR and VI

There is no official U.S. government definition for the region, and it is defined variably among agencies and organizations.

Geography[edit]

The United States Geological Survey defines Southeastern United States as including the states of Alabama, Arkansas, Florida, Georgia, Kentucky, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee, Puerto Rico, the United States Virgin Islands, and Virginia.


There is no official United States Census Bureau definition of the Southeastern United States. They instead divide a larger region which includes Texas, Oklahoma, Maryland, Delaware, Washington, D.C., and West Virginia, designated as "the South," into three separate subregions, none of which are conventionally considered to define the Southeast.


The nonprofit American Association of Geographers defines the Southeastern United States as including Alabama, Florida, Georgia, Kentucky, Maryland, Mississippi, North Carolina, South Carolina, Tennessee, Virginia, and West Virginia.[3] The OSBO (Organization Supporting Business Owners) uses the same states, but includes Arkansas and Louisiana. The states of Delaware and Missouri, along with the U.S. capital of Washington, D.C., are also sometimes added in definitions of the term.

Demographics[edit]

Most populous states[edit]

The most populous states in the region as of the 2020 United States census are: Florida (21,538,187), followed by Georgia (10,711,908), and North Carolina (10,439,388).[4]

Climate[edit]

Most of the southeastern part of the United States is dominated by the humid subtropical climate (Cfa/Cwa). As one nears the southern portion of Florida, the climate gradually becomes tropical, as the winter season and all months have a mean temperature above 64.4 °F (18.0 °C) (the defined coldest monthly mean temperature of tropical climates).


Seasonally, summers are generally hot and humid throughout the entire region. The Bermuda High pumps hot and moist air mass from the tropical Atlantic Ocean and eastern Gulf of Mexico westward toward the southeast United States, creating the typical sultry tropical summers. Daytime highs are often in the upper 80s to lower 90s F.[15][16] Rainfall is summer concentrated along the Gulf Coast and the South Atlantic coast from Norfolk, Virginia southward, reaching a sharp summer monsoon-like pattern over peninsular Florida, with dry winters and wet summers. Sunshine is abundant across the southeastern United States in summer, as the rainfall often comes in quick, but intense downpours. The mid-South, especially Tennessee, and the northern halves of Mississippi, Alabama, and Georgia, have maximum monthly rainfall amounts in winter and spring, owing to copious Gulf moisture and clashes between warm, moist air from the Gulf of Mexico and cold, dry air from Canada during the cold season. In this area, December, March, or April are typically the wettest months; August to October, the driest months (for example, in Tupelo, MS, Huntsville, AL and Memphis, TN).


Winters are cool in the northern areas like Tennessee, Virginia, Maryland, and western North Carolina, with average high temperatures in the 45 °F (7 °C) range in January. Farther south, winters become milder across interior eastern North and South Carolina, Georgia, and Alabama, with average January highs in the 53 °F (12 °C) range. As one nears the Gulf of Mexico, coastal plain, and coastal areas of Georgia and the Carolinas, winters become warm, with daytime highs near or over 60 °F (16 °C). Once in Florida, daytime highs are above 70 °F (21 °C) from just south of St. Augustine on the Atlantic coast and Clearwater on the Gulf Of Mexico. Extreme southern Florida has the warmest winter temperatures (mid 70's F) in the United States. Winters tend to be very dry and sunny across Florida, with a gradual increase in winter rainfall with increasing latitude, especially west of the Appalachian Mountains.

Appalachia

Black Belt in the American South

Deep South

– Southeastern habitat

Hammock (ecology)

Indigenous peoples of the Southeastern Woodlands

– Southeastern habitat

Southeastern conifer forests

– Southeastern habitat

Southeastern mixed forests

Upland South

by the North Carolina Botanical Garden & University of North Carolina Herbarium (NCU).

Flora Atlas of the Southeastern United States

University of South Florida (August 2011)

Sea Level Changes in the Southeastern United States. Past, Present, and Future

on YouTube

Britannica Southeast U.S. – video