Thyroid　cancer　is　the　most　common　endocrine　malignant　tumor　with　rapidly　increasing　incidence　in　recent　decades.　Although　the　majority　of　thyroid　cancers　are　relatively　indolent,　some　cases　still　have　a　risk　of　developing　into　more　aggressive　and　lethal　forms　of　thyroid　cancers.　Similar　to　other　malignancies,　thyroid　tumorigenesis　is　a　multistep　process　involving　the　accumulation　of　a　large　number　of　genetic　and　epigenetic　alterations.　Thus,　determination　of　the　mechanisms　of　tumorigenesis　is　an　urgent　need　for　thyroid　cancer　treatment.　Long　noncoding　RNAs　(LncRNAs)　have　recently　been　demonstrated　to　participate　in　cancer　progression.　However,　their　role　and　molecular　mechanism　in　thyroid　cancer　remain　largely　unclear.　In　this　review,　we　focus　on　the　dysregulation　of　lncRNAs　in　thyroid　cancer,　summarize　the　latest　findings　regarding　the　functions　and　mechanism　of　lncRNAs　in　thyroid　cancer,　and　discuss　their　potential　clinical　significance　in　diagnosis　and　prognosis　of　thyroid　cancer.