Objectives. Emergency departments (EDs) are the basic unit of emergency medicine (EM), but there is often significant heterogeneity and differences in ED organization. We sought to describe and characterize EDs in Slovenia. Methods. All EDs open 24/7 to the general public were surveyed using the National ED Inventories survey instrument. Staff were asked about ED characteristics with reference to calendar year 2007. Results. Fifty-five EDs participated (81% response). All EDs treated children and adults. Eleven (20%) of the EDs were hospital based and 44 (80%) were non-hospital based. The median number of annual visits for hospital-based EDs was 21,400 (interquartile range, 19,900-34,200) and 5,000 (interquartile range, 1,100-9,300) for nonhospital-based EDs. All hospital-based EDs had triage to service, and only one was an independent department. Most respondents (76%, 95% CI 64-89%) thought their ED was at good balance or capacity. While hospital-based EDs had high availability of technological resources and ability to treat virtually all emergency types 24/7, these characteristics were less frequent in nonhospital-based EDs. Conclusions. The organization of emergency care in Slovenia is complex, with some variation in the layout, characteristics, and capabilities of its EDs. This initial study establishes a benchmark for future investigations into intra-country comparisons of different types of EDs.