NCHS - Drug Poisoning Mortality by County: United States
This dataset contains model-based county estimates for drug-poisoning mortality. 

Deaths are classified using the International Classification of Diseases, Tenth Revision (ICD–10). Drug-poisoning deaths are defined as having ICD–10 underlying cause-of-death codes X40–X44 (unintentional), X60–X64 (suicide), X85 …