李珪，是《三國演義》中的虛構人物，荊州諸侯劉表幕僚，正史上並無此人。
劉表死後，蔡瑁等偽造劉表的遺言，商議立次子劉琮為主，李珪建議以長子劉琦為荊州之主。蔡瑁叱責他：「你是何人，怎敢以亂言背逆主公遺命！」李珪大罵：「你內外朋謀，假稱遺命，廢長立幼，眼見荊襄九郡，就要斷送於蔡氏之手！故主劉表有靈，必當殺了你！」蔡瑁大怒，喝令左右將他推出斬殺。李珪至死大罵不絕[1]。
參考文獻
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