Nebraska (1867), Colorado (1876), North Dakota (1889), South Dakota (1889), Montana (1889), Washington (1889), Idaho (1890), Wyoming (1890), Utah (1896), Oklahoma (1907), New Mexico (1912), Arizona (1912), Alaska (1959), and Hawaii (1959) joined the union after the Civil War.
There were 34 States in the Union when the Civil War began.
Seven states seceded from the Union to join the Confederates.
There were fifty states in the union of the United States of America in 2005. The last state to join the union was Hawaii in 1959.
During the civil war there were 24 states in the union including the border states. but there was 23 states that remained loyal to the union during the war.
In 1866, there were 37 states in the United States. This was after the Civil War and during the Reconstruction era, as several Southern states had been re-admitted to the Union after their secession. The last state to join before 1866 was West Virginia, which became a state in 1863.
25 of the 33 existing states in the United States had sided with the union by the end of the Civil War.
All New England states remained in the Union during the Civil war.
11 States
25 of the 33 existing states in the United States had sided with the union by the end of the Civil War.
some were forced to fight for their masters but many escaped and fought for the union
Twenty-five states made up the Union during the civil war. These include five slaves states that were referred to as border states. Nevada and West Virginian became states during the Civil War and joined with the Union states.
25 real states but if you count the territories it would be... 32 (minus indian territory)