List of Ohio Civil War units

During the American Civil War, nearly 320,000 Ohioans served in the Union Army, more than any other Northern state except New York and Pennsylvania. Of these, 5,092 were free blacks. Ohio had the highest percentage of population enlisted in the military of any state. Sixty percent of all the men between the ages of 18 and 45 were in the service. Ohio mustered 230 regiments of infantry and cavalry, as well as 25 light artillery batteries and 5 independent companies of sharpshooters. Total casualties among these units numbered 35,475 men, more than 10% of all the Buckeyes in uniform during the war. There were 6,835 men killed in action, including 402 officers.

1st Ohio Light Artillery

 * Battery A, 1st Ohio Light Artillery
 * Battery B, 1st Ohio Light Artillery
 * Battery C, 1st Ohio Light Artillery
 * Battery D, 1st Ohio Light Artillery
 * Battery E, 1st Ohio Light Artillery
 * Battery F, 1st Ohio Light Artillery
 * Battery G, 1st Ohio Light Artillery
 * Battery H, 1st Ohio Light Artillery
 * Battery I, 1st Ohio Light Artillery
 * Battery K, 1st Ohio Light Artillery
 * Battery L, 1st Ohio Light Artillery
 * Battery M, 1st Ohio Light Artillery

Ohio Heavy Artillery Regiments

 * 1st Ohio Heavy Artillery
 * 2nd Ohio Heavy Artillery

Other Ohio Volunteer Infantry Units

 * Black Brigade of Cincinnati
 * 1st Battalion Ohio Sharpshooters
 * 1st Independent Company Sharpshooters
 * 2nd Independent Company Sharpshooters
 * 3rd Independent Company Sharpshooters
 * 4th Independent Company Sharpshooters
 * 5th Independent Company Sharpshooters
 * 6th Independent Company Sharpshooters
 * 7th Independent Company Sharpshooters [Sherman's Bodyguard]
 * 8th Independent Company Sharpshooters
 * 9th Independent Company Sharpshooters
 * 10th Independent Company Sharpshooters
 * Captain Bard's Company
 * Dennison Guards
 * Trumbull Guards
 * Wallace Guards
 * Departmental Corps

Other Ohio Volunteer Cavalry Units

 * 1st Independent Battalion Cavalry, later 11th Ohio Cavalry
 * 2nd Independent Battalion Cavalry
 * 3rd Independent Battalion Cavalry
 * 4th Independent Battalion Cavalry
 * 5th Independent Battalion Cavalry
 * McLaughlin's Independent Squadron Cavalry
 * Blazer's Scouts
 * 3rd Independent Company Cavalry
 * 4th Independent Company Cavalry
 * 5th Independent Company Cavalry
 * 6th Independent Company Cavalry
 * Burdsell's Independent Company Cavalry
 * George's Independent Company Cavalry
 * Ironton Independent Company Cavalry
 * Harlan Light Cavalry
 * Union Light Guard