This category refers to people associated with the state of Ohio and the American Civil War.

v t e Ohio in the American Civil War
1861	Early military recruiting Camp Chase Camp Dennison Camp Harrison Camp Thomas Department of the Ohio Johnson's Island POW camp
1862	Anti-war movement Knights of the Golden Circle First Confederate incursion into Ohio Defense of Cincinnati Black Brigade of Cincinnati
1863	"Fort Fizzle" Morgan's Raid Battle of Buffington Island Battle of Salineville
1864–65	Hundred Days Men Cincinnati in the War Cleveland in the War Buckeye POWs and the Sultana
Post-war	Soldiers' and Sailors' Monument
Personnel	Units Generals and Admirals Fighting McCooks