The 11 states that seceded from the United States in 1860 and 1861, forming the Confederacy during the Civil War, are:
- South Carolina (seceded on December 20, 1860)
- Mississippi (January 9, 1861)
- Florida (January 10, 1861)
- Alabama (January 11, 1861)
- Georgia (January 19, 1861)
- Louisiana (January 26, 1861)
- Texas (February 1, 1861)
- Virginia (April 17, 1861)
- Arkansas (May 6, 1861)
- Tennessee (May 7, 1861)
- North Carolina (May 20, 1861)
These states collectively formed the Confederate States of America, which existed from 1861 until 1865.