Mercer County Of Court House Sharpsville, PA 16150 Phone : (724) 962-5711 Business Category Government Offices-County Government Offices & Public Schools Mercer County Courthouse Diamond Sq Mercer, PA 16137 Phone : (724) 962-5711 Mercer County Courthouse Business Category Government Offices-County Legislative Bodies Mercer County Government--alternate Number Mercer, PA 16137 Phone : (724) 962-5711 Business Category Government Offices-County Government Offices & Public Schools