Mercer County Of--dog Pound, Dog Registration Aledo, IL 61231 Phone : (309) 582-2138 Business Category Government Offices-County Government Offices & Public Schools Mercer County--dog Registration, Courthouse 100 Se 3rd St Aledo, IL 61231 Phone : (309) 582-2138 Business Category Government Offices-County Legislative Bodies Administration Of Urban Planning & Community/Rural Dev Government Offices & Public Schools