Tumors of the parapharyngeal space are highly uncommon, comprising only 0.5% of head and neck tumors, the vast majority of which are benign (80%). Common tumors of the parapharyngeal space include major and minor salivary gland tumors, glomus tumors (paragangliomas), and neuromas. However, a dramatic variety of tumors of other histological etiologies have been described in this anatomic space. The number of teratomas that occur per live birth each year is about one per 4,000, and teratomas in the head and neck region comprise less than 10% of all teratomas in newborns. Most of these are diagnosed in utero or perinatally via ultrasound screening, and surgically resected during infancy. While there are several reports in the literature of adult parapharyngeal space teratomas, the vast majority of these are malignant in nature and no benign teratomas have been described to recur after surgical treatment. This is a case of an adult female who presented mildly symptomatic and reported having a mass removed from her neck as an infant. Radiographic imaging detected the presence of a heterogeneous, encapsulated mass in the parapharyngeal space that was surgically resected, and subsequently pathologically confirmed to be a benign, mature teratoma.