<p>The African American Cardiovascular Pharmacogenomics Consortium (ACCOuNT) assembled an observational cohort to characterize genetic and clinical determinants of inter‑individual variability in warfarin dose requirements among participants of African ancestry receiving anticoagulation care. The submission includes individual‑level genotypes in PLINK format (.bed/.bim/.fam) and a harmonized phenotype file with stable warfarin dose, age, height, weight, and concomitant medication indicators (aspirin, amiodarone) for 309 participants. Biospecimens are germline DNA from peripheral blood; no tumor samples and no case–control disease labels are involved. The resource is intended to enable discovery and validation of pharmacogenomic loci, development of dose‑prediction models, and methods benchmarking focused on underrepresented populations. Data available through dbGaP comprise the genotype files, the subject‑level phenotype dataset, and minimal sample metadata needed to link subjects to biospecimens.</p>