The Mercer County Commission appoints the following boards:
- Community Action of Southeastern WV (CASEWV)
- Glenwood Recreation Park Advisory Board
- Hatfield McCoy Trail Board
- I-73/74 King Coal Highway Authority
- Mercer County Airport Authority
- Mercer County Board of Health
- Mercer County Civil Service Board
- Mercer County Communications Center (911)
- Mercer County Convention and Visitors Bureau
- Mercer County Development Authority
- Mercer County Fire Service Board
- Mercer County Planning Commission
- 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
- Mountain RC&D
- National Coal Heritage Highway Authority
- Region One Planning and Development Council
- Southern Regional Community Corrections Board
- West Virginia Workforce