The following is a list of the units of the United States Regular Army during the American Civil War.
Infantry edit
- 1st Infantry Regiment
- 2nd Infantry Regiment
- 3rd Infantry Regiment
- 4th Infantry Regiment
- 5th Infantry Regiment
- 6th Infantry Regiment
- 7th Infantry Regiment
- 8th Infantry Regiment
- 9th Infantry Regiment
- 10th Infantry Regiment
- 11th Infantry Regiment
- 12th Infantry Regiment
- 13th Infantry Regiment
- 14th Infantry Regiment
- 15th Infantry Regiment
- 16th Infantry Regiment
- 17th Infantry Regiment
- 18th Infantry Regiment
- 19th Infantry Regiment