Little is known about the costs of syncope-related admissions in the United States. A nationally representative sample of hospital discharges and reported charges was analyzed, and costs were estimated using Medicare cost-to-charge ratios. A conservative estimate of total annual costs for syncope-related hospitalizations was $2.4 billion (95% confidence interval [CI] $2.2 to $2.6 billion), with a mean cost of $5,400 (95% CI $5,100 to $5,600) per hospitalization. Efforts to safely decrease syncope-related admissions may result in substantial costs savings.