Union is located in Union County, of which it is the county seat. The city is situated southeast of Spartanburg between Gaffney and Newberry along United States Highway 176. Union is situated close to Sumter National Forest.
Union offers a variety of recreation opportunities including golf, tennis, youth activities, and more. There are plenty of nearby resources for hunting, fishing, camping, boating and many more outdoor activities. The nearby Broad River offers opportunities for canoeing and kayaking. The river is also a source of electricity for the county.
The Union area is steeped in history boasting antebellum plantations and Civil War relics.
There is also a Union, West Virginia.