What U.S. states were in the Union during the Civil War and what states were in the Confederacy?

Twenty-five states were in the Union by the end of the Civil War; 11 were in the Confederacy.

The states were:

Union Confederacy
California Alabama
Connecticut Arkansas
Delaware Florida
Illinois Georgia
Indiana Louisiana
Iowa Mississippi
Kansas North Carolina
Kentucky South Carolina
Maine Tennessee
Maryland Texas
Massachusetts Virginia
Michigan Minnesota Missouri Nevada
New Hampshire
New Jersey New York Ohio
Oregon
Pennsylvania
Rhode Island
Vermont West Virginia
Wisconsin

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