Mercer County Of--administration Department Of, County Chief Of Staff, Economic Opportunity, Cultural Heritage Trenton, NJ 08640 Phone : (609) 989-6899 Business Category Government Offices & Public Schools Mercer County Of--administration Department Of, Economic Development, Cultural Heritage Trenton, NJ 08608 Phone : (609) 989-6899 Business Category Government Offices-County Government Offices & Public Schools Mercer County Of--county Administrator, Cultural Heritage Trenton, NJ 08608 Phone : (609) 989-6899 Business Category Government Offices-County Government Offices & Public Schools Mercer County Of--cultural & Heritage Trenton, NJ 08608 Phone : (609) 989-6899 Business Category Government Offices-County Government Offices & Public Schools