| Company | Known As | Recruited From |
|---|---|---|
| Company A | Somerset Infantry | Somerset County, Pa. |
| Company B | Middlesex Rangers | Middlesex, Mercer Co., Pa. |
| Company C | Venango Greys | Venango County, Pa. |
| Company D | Jefferson Light Guards | Washington County, Pa. |
| Company E | Clarion River Guards | Clarion County, Pa. |
| Company F | Curtin Rifles | Beaver County, Pa. |
| Company G | Mercer Rifles | Mercer County, Pa. |
| Company H | Warren Guards | Warren County, Pa. |
| Company I | Allegheny College Volunteers | Crawford County, Pa. |
| Company K | Wilson Rifles | Beaver County, Pa. |
| Field & Staff | ||
| Regimental Band | ||
| Unassigned Men |
