Eosinophilic esophagitis (EE) is an inflammatory disease of the esophagus characterized by eosinophilic infiltration of the esophageal mucosa. Symptoms of EE are variable, and include gastroesophageal reflux symptoms, abdominal pain, growth failure, and dysphagia. Dysphagia is a more common presentation in adults and older children. Serious complications of EE consisting of esophageal food impactions necessitating urgent endoscopic removal of the food and esophageal strictures requiring endoscopic balloon dilatations are also seen. The potential severity of these symptoms points to the importance of proper recognition and management of the disease, especially given that EE has become more prevalent over the past decade. In this article, available evidence on the epidemiology and etiology of EE is discussed.