This Healthcare Cost and Utilization Project (HCUP) Statistical Brief presents statistics on the cost of ED visits in the United States using the 2017 Nationwide Emergency Department Sample (NEDS). Total ED charges were converted to costs using HCUP Cost-to-Charge Ratios based on hospital accounting reports from the Centers for Medicare & Medicaid Services (CMS). ED visits include patients treated and released from the ED, as well as those admitted to the same hospital through the ED. Aggregate costs, average costs, and number of ED visits are presented by patient and hospital characteristics. Because of the large sample size of the NEDS data, small differences can be statistically significant. Thus, only percentage differences greater than or equal to 10 percent are discussed in the text.