The Mercer County Commission appoints a variety of boards and authorities. The following is a list with a * for representation by a Commissioner.
- Community Action of Southeastern WV (CASEWV) - *Bill Archer
- Glenwood Recreation Park Advisory Board
- Hatfield McCoy Trail Board - *Gene Buckner
- I-73/74 King Coal Highway Authority - *Greg Puckett
- Mercer County Airport Authority - *Bill Archer
- Mercer County Board of Health
- Mercer County Civil Service Board
- Mercer County Communications Center (911) - *Greg Puckett
- Mercer County Convention and Visitors Bureau - *Greg Puckett
- Mercer County Development Authority - *Gene Buckner
- Mercer County Fire Service Board
- Mercer County Planning Commission - *Greg Puckett
- Mercer County Public Defender Board
- Mercer County Public Service Districts
- Bluewell PSD
- Bramwell PSD
- Green Valley / Glenwood PSD
- Lashmeet PSD
- Mercer County PSD (details coming soon)
- Oakvale Road PSD
- Mercer County Solid Waste Authority
- Mercer County Tourist Train Authority
- Mountain RC&D
- National Coal Heritage Highway Authority
- New River Parkway Authority
- Region One Planning and Development Council
- Shawnee Parkway Authority
- Southern Regional Community Corrections Board - *Bill Archer
- West Virginia Workforce