Civil War Wiki
For the mining camp in California, see Camp Union, California.
Not to be confused with Camp Union (Oregon) a temporary U. S. Army encampment on Silver Creek about 30 miles northwest of Harney Lake, near Riley, Oregon in 1860.
Not to be confused with Camp Union (California) a major training ground for the California Volunteers established in 1861, at Sacramento, California.

Camp Union was a military training center for the Union Army during the American Civil War. Constructed near Philadelphia, Pennsylvania, the camp operated from 1861 until 1865, and primarily served various Pennsylvania volunteer regiments.

The camp, one of 17 training sites in the greater Philadelphia region, was located north of Ridge Road (now Ridge Avenue), not far from the Falls of the Schuylkill River. Thousands of recruits were mustered into Federal service, and were drilled and taught military tactics before their regiments were sent to the South.