A Lingual thyroid is relatively rare. Of all ectopic thyroids 90 % are found to be Lingual thyroids. We report a case of 32 year old female who presented to us with history of mass on back of the tongue with history of dysphagia. The clinical, biochemical and radioisotope scanning confirms the diagnosis of lingual thyroid with hypothyroidism. Patient was treated with levothyroxine. After treatment, Lingual thyroid reduced in size and patient improved symptomatically.