Thyroglossal duct cyst (TGDC) is the most common developmental abnormality of the thyroid gland that arises from a tubal remnant of thyroid descent during migration (1). It accounts for 70% of congenital neck masses. In 76% of cases, the cyst occurs before age six year (2). While it is the most common congenital neck mass in children, occurrence of the disease in elderly patients is rare (3). In this paper, we reported an elderly patient with TGDC presenting as a lateral neck mass with intralaryngeal extension. Apart from his age, localization and presentation of the cyst, our case was different from other common cases.