Union County Association of Realtors
- Includes a directory of area agents and agencies, listings, and related links.
- http://www.unioncountyrealtors.com/

Union County Development Board
- Includes available properties, demographics, taxes and incentives, and details on available workforce and training.
- http://www.unioncountydevelopment.com/

Union County Chamber of Commerce
- Site provides information on the county, links and contact information to a number of services.
- http://www.unionsc.com/

SCFC Union County
- South Carolina Forestry Commission contact information for Union County.
- http://www.state.sc.us/forest/uni.htm

Union County Printworks
- A commission textile rotary and flatbed printer.
- http://www.unioncountyprintworks.com/