How Many States Were There In The Civil War

Introduction

The American Civil War (1861‑1865) was fought between the Union – the United States federal government and the states that remained loyal to it – and the Confederacy, a coalition of Southern states that had seceded from the Union. That said, when historians ask “how many states were there in the civil war,” they are usually looking for two related figures: the number of states that comprised the Union and the number that formed the Confederate States of America. In total, 34 distinct states existed during the war, with 23 staying in the Union and 11 joining the Confederacy. This article breaks down those numbers, lists each state, explains the role of border states, and answers the most common questions surrounding the figure.

Union States

At the outbreak of hostilities in April 1861, the United States consisted of 23 states that remained loyal to the federal government. These states contributed the bulk of the Union’s military manpower, industrial capacity, and financial resources.

List of Union States (23):

1. Connecticut
2. Delaware
3. Illinois
4. Indiana
5. Iowa
6. Kentucky (initially neutral, later joined the Union)
7. Maryland
8. Massachusetts
9. Michigan
10. Minnesota
11. Missouri (remained in the Union despite strong Southern ties)
12. New Hampshire
13. New Jersey
14. New York
15. Ohio
16. Pennsylvania
17. Rhode Island
18. Vermont
19. Washington
20. Wisconsin
21. California (admitted 1850, far western frontier)
22. Florida (remained in the Union after secession attempts were thwarted)
23. Texas (though it seceded, its government was not recognized by the Union; it was effectively a Confederate state but its official status remained Union until 1865)

Note: Nevada joined the Union in 1864, after the war had already begun, so it is not counted among the original 23 but did provide additional troops and resources later in the conflict.

Confederate States

The Confederate States of America was

Confederate States

The Confederate States of America (CSA) was formed in February 1861 when seven Deep‑South states seceded from the Union and convened in Montgomery, Alabama, to draft a constitution. Four more states joined after Lincoln’s call for troops, bringing the total to eleven.

*Texas had already voted for secession on 2 Feb 1861, but its formal ordinance was ratified on 1 Feb 1861; it therefore counts among the eleven Confederate states.

These eleven states made up the political core of the CSA and fielded the majority of its regular armies. Their combined populations supplied roughly 2 million men to the Confederate war effort, of whom about 750,000 served in uniform.

Border States – The “Gray‑Area” States

Four slave‑holding states did not join the Confederacy, yet their loyalties were split and their populations were deeply divided. Historians refer to them as border states because they lay on the geographic and political frontier between North and South.

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Because these states never formally seceded, they are counted among the 23 Union states. Their strategic importance—control of the Ohio River, vital rail lines, and the protection of Washington, D.C.—cannot be overstated.

Territories and States Not Yet Admitted

During the war, three organized territories existed that would later become states:

• Dakota Territory (North & South Dakota) – admitted 1889
• Colorado Territory – admitted 1876
• Nebraska Territory – admitted 1867

These territories supplied volunteers and supplies but were not counted as “states” in the 1860 census, so they are excluded from the 34‑state total.

Frequently Asked Questions

The Significance of the Numbers

Understanding the 23 + 11 split helps clarify several broader themes of the Civil War:

1. Industrial vs. Agrarian Power – The Union’s 23 states contained the majority of the nation’s factories, railroads, and banks, giving it a decisive logistical advantage.
2. Population Disparity – In 1860 the Union housed roughly 22 million people, while the Confederacy’s population was about 9 million (including 3.5 million enslaved persons).
3. Political Legitimacy – The Union’s claim to represent the United States rested on the fact that the majority of states (including the capital) never left the federation. The Confederacy’s legitimacy hinged on the secession of a minority of states, a point that resonated in post‑war Reconstruction debates.
4. Border State Influence – The four border states supplied nearly 200,000 Union soldiers and controlled critical transportation corridors; their decision to stay in the Union prevented the Confederacy from extending its defensive line westward.

Conclusion

When historians ask “how many states were there in the Civil War?” the answer depends on the lens through which the question is asked.

• At the war’s start (April 1861) there were 23 Union states and 11 Confederate states, a total of 34 distinct states that had already achieved statehood.
• During the conflict, West Virginia’s admission (1863) and Nevada’s (1864) increased the Union count to 24 and 25 respectively, while the Confederate count remained unchanged.
• Territories that later became states are sometimes added to the tally, producing the occasionally cited figure of 35 or 36 when Nevada is included.

Regardless of the exact arithmetic, the essential takeaway is clear: the Union commanded a decisive numerical, industrial, and demographic advantage, while the Confederacy relied on a compact coalition of eleven states whose shared commitment to slavery and states’ rights drove the war. Understanding the composition of those states—and the special status of the border states—provides a solid foundation for interpreting the military strategies, political debates, and lasting legacies of America’s bloodiest conflict.