Clay County Assessor 246 Main St Clay, WV 25043 Phone : (304) 587-4258 Business Category Public Finance Taxation & Monetary Policy Clay County Of--assessors Office Clay, WV 25043 Phone : (304) 587-4258 Business Category Government Offices-County Government Offices & Public Schools Clay County--flood Plain Permit Officer, Assessor Po Box 310 Clay, WV 25043 Phone : (304) 587-4258 Business Category Government Offices-County Government Offices & Public Schools