The document analyzes regional differences in access to emergency care in the United States. It finds that while the majority of the US population can access an emergency department (ED) within 30 minutes, access varies significantly by region and ED characteristics. Rural areas have lower access rates to all types of EDs compared to urban and suburban areas. The type of ED that has the best access within 30 minutes is any ED, followed by higher volume EDs, with teaching hospitals having the lowest access rates within 30 minutes. There are opportunities to improve emergency care through understanding ED capabilities, referral networks, and the relationship between access and health outcomes.