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Infantry
- 1st Regiment Connecticut Volunteer Infantry (3 months)
- 2nd Regiment Connecticut Volunteer Infantry (3 months)
- 3rd Regiment Connecticut Volunteer Infantry (3 months)
- 4th Regiment Connecticut Volunteer Infantry
- 5th Regiment Connecticut Volunteer Infantry
- 6th Regiment Connecticut Volunteer Infantry
- 7th Regiment Connecticut Volunteer Infantry
- 8th Regiment Connecticut Volunteer Infantry
- 9th Regiment Connecticut Volunteer Infantry
- 10th Regiment Connecticut Volunteer Infantry
- 11th Regiment Connecticut Volunteer Infantry
- 12th Regiment Connecticut Volunteer Infantry
- 13th Regiment Connecticut Volunteer Infantry
- 14th Regiment Connecticut Volunteer Infantry
- 15th Regiment Connecticut Volunteer Infantry
- 16th Regiment Connecticut Volunteer Infantry
- 17th Regiment Connecticut Volunteer Infantry
- 18th Regiment Connecticut Volunteer Infantry
- 19th Regiment Connecticut Volunteer Infantry
- 20th Regiment Connecticut Volunteer Infantry
- 21st Regiment Connecticut Volunteer Infantry
- 22nd Regiment Connecticut Volunteer Infantry
- 23rd Regiment Connecticut Volunteer Infantry
- 24th Regiment Connecticut Volunteer Infantry
- 25th Regiment Connecticut Volunteer Infantry
- 26th Regiment Connecticut Volunteer Infantry
- 27th Regiment Connecticut Volunteer Infantry
- 28th Regiment Connecticut Volunteer Infantry
- 29th Regiment Connecticut Volunteer Infantry (African Descent)
- 30th Regiment Connecticut Volunteer Infantry (African Descent) - four companies organized in March 1864; consolidated with the 31st United States Colored Infantry on May 18, 1864
Cavalry
Artillery
- 1st Connecticut Heavy Artillery Regiment
- 2nd Connecticut Heavy Artillery Regiment
- 1st Connecticut Light Artillery Battery
- 2nd Connecticut Light Artillery Battery
- 3rd Connecticut Light Artillery Battery