|DeKalb County, Alabama|
DeKalb County courthouse in Fort Payne
Location in the U.S. state of Alabama
Alabama's location in the U.S.
|Founded||January 9, 1836|
|Named for||Johan DeKalb|
|Largest city||Fort Payne|
|• Total||779 sq mi (2,018 km2)|
|• Land||777 sq mi (2,012 km2)|
|• Water||1.6 sq mi (4 km2), 0.2%|
|• ( 2017)||71,617|
|• Density||92/sq mi (36/km2)|
|Time zone||Central: UTC−6/ −5|
DeKalb County was created by the Alabama legislature on January 9, 1836,  from land ceded to the Federal government by the Cherokee Nation. It was named for Major General Baron Johann de Kalb, a hero of the American Revolution. 
The county's eastern edge, along the state line, was also the epicenter of an earthquake on April 29, 2003, measuring 4.6 on the Richter scale. Power was knocked out in the area, mirrors and pictures thrown to the floor, foundations cracked, and one chimney fell to the ground. It was felt over a significant portion of the southeastern states, including quite strongly in northeastern Alabama and neighboring northern Georgia, and nearby eastern Tennessee (especially near Chattanooga). It was also felt slightly in western upstate South Carolina, far west-southwestern North Carolina, south and southeastern Kentucky, and east-northeastern Mississippi.
On the whole, DeKalb County is a dry county. In 2005, a change in local laws enabled Fort Payne to become the only location in the county to allow the legal sale of alcohol.  Collinsville later allowed alcohol sales.
DeKalb County saw one of the highest death tolls in Alabama during a massive tornadic system in April 2011, the 2011 Super Outbreak, with 31 deaths reported in the county.
- Jackson County - north
- Dade County, Georgia - northeast (EST)
- Walker County, Georgia - east (EST)
- Chattooga County, Georgia - east (EST)
- Cherokee County - southeast
- Etowah County - south
- Marshall County - west
|U.S. Decennial Census
1790–1960  1900–1990 
1990–2000  2010–2017 
As of the census  of 2010, there were 71,109 people, 26,842 households, and 19,361 families residing in the county. The population density was 92 people per square mile (36/km2). There were 31,109 housing units at an average density of 39.9 per square mile (15/km2). The racial makeup of the county was 84.5% White(non-Hispanic), 1.5% Black or African American, 1.4% Native American, 0.3% Asian, 0.2% Pacific Islander, 9.9% from other races, and 2.2% from two or more races. 13.6% of the population were Hispanic or Latino of any race.
As of the census  of 2000, there were 64,452 people, 25,113 households, and 18,432 families residing in the county. The population density was 83 people per square mile (32/km2). There were 28,051 housing units at an average density of 36 per square mile (14/km2). The racial makeup of the county was 92.55% White(non-Hispanic), 1.68% Black or African American, 0.80% Native American, 0.19% Asian, 0.06% Pacific Islander, 3.10% from other races, and 1.62% from two or more races. 5.55% of the population were Hispanic or Latino of any race.
- Interstate 59
- U.S. Route 11
- State Route 35
- State Route 40
- State Route 68
- State Route 75
- State Route 117
- State Route 176
- State Route 227
DeKalb County is strongly Republican. Eighty-three percent of its voters supported Donald Trump in 2016, and no Democrat has carried it since Southerner Jimmy Carter did so in 1976. Populist appeal in the county during the period of “ Redemption” meant that even during the “ Solid South” era DeKalb County sometimes supported victorious Republican presidential candidates, as it did during the three Republican landslides of the 1920s.
- Beaty Crossroads
- Chigger Hill
- Dog Town
- Fischer Crossroads, Alabama
- Gibson Crossroads
- Gilbert Crossroads
- Green Chapel
- Grove Oak
- Hendrixville, Alabama
- High Point, Alabama
- Horton, Alabama
- Kaolin, Alabam
- Lake Howard
- Mahan Crossroads
- Moores Crossroads
- Mt. Vernon, Alabama
- Oak Hill, Alabama
- Oak Grove
- Peeks Corner
- Pleasant Hill
- Pumpkin Center
- Shiloh North DeKalb County
- Skaggs Corner
- South Hill
- Sulphur Springs
- Ten Broeck
- Townsend Crossroads
- National Register of Historic Places listings in DeKalb County, Alabama
- Properties on the Alabama Register of Landmarks and Heritage in DeKalb County, Alabama
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