A 1-year-old male bald eagle (Haliaeetus leucocephalus) was admitted to the Alaska Raptor Center with abdominal distention, anemia, respiratory distress, and chronic malnourishment. Despite medical care, the eagle died. At necropsy, a large mass was found, which occupied most of the coelom. The mass displaced and compressed the viscera and was attached to the wall of the ventriculus. On histopathologic examination, the mass was diagnosed as a malignant teratoma. This is the first reported case of a teratoma in a bald eagle.