Clay County Development Corp 172 Main St Clay, WV 25043 Phone : (304) 587-4251 Business Category Government Offices-County Social Service & Welfare Organizations Legislative Bodies Clay County Of--clay Co Development Corp Clay, WV 25043 Phone : (304) 587-4251 Business Category Government Offices-County Government Offices & Public Schools Clay County--county Development Corporation Po Box 455 Clay, WV 25043 Phone : (304) 587-4251 Business Category Government Offices-County Government Offices & Public Schools