Despite the controversy this answer will cause, a declaration of war was quite a formal act in the 19th Century. With that said, the States forming the Confederacy did not declare that a state of war existed with the US until May 6, 1861.
To satisfy the preponderate view that the war began in Charleston Bay on April 12, 1861, here are the order in which the "Southern States" seceded from the United States:
1. South Carolina 12/20/1860;
2. Mississippi 1/9/ 1861
3. Florida 1/10/1861
4.Alabama 1/11/1861
5. Georgia 1/19/1861
6.Louisiana 1/26/1861
7. Texas 2/1/1861
8. Virginia 4/17/1861
9. Arkansas 5/6/1861
10. North Carolina 5/20/1861
11. Tennessee 6/8/1861
South Carolina seceded from the Union before the Civil War.
West Virginia seceded from Virginia when Virginia seceded from the Union. It was admitted in 1864.
Seven states seceded from the Union prior to the outbreak of the Civil War: South Carolina, Mississippi, Florida, Alabama, Georgia, Louisiana, and Texas. After the Civil War started, four more states seceded: Virginia, Arkansas, Tennessee, and North Carolina.
South Carolina. Texas.
All the states that formed the original confederacy seceded before the civil war, 11 in total: South Carolina Mississippi Alabama Florida Texas Arkansas Georgia North Carolina Tennessee Virginia Louisiana
They seceded from the Union, and the US Civil War, followed.
Secession is the formal withdrawal of a state from the Union. There were eleven Southern states that seceded from the Union in 1860, which led to the Civil War.
The first state to secede from the American Union was South Carolina. Directly as a result of the election of Abraham Lincoln as the 16th American president, this southern state seceded from the Union on December 20, 1860.
The Union States (northern and non slavery) and the Confederate State (seceded from the union, southern, and pro slavery).
Do you mean who seceded first - from the Union? That was South Carolina. Later one state seceded from the Confederacy, and that was West Virginia.
Texas seceded on February 1st.
The first state to leave the Union was South Carolina. Six more followed before the first shots were fired at Fort Sumter. Lincoln responded by calling for volunteer-troops, and four more states seceded.