Laertes may refer to:

• Laertes (father of Odysseus), Ionian king and the father of Odysseus in Greek mythology
• Laertes (Hamlet), son of Polonius and brother of Ophelia in Shakespeare's play Hamlet
• Laertes (Cilicia), an ancient town archeological site in Asiatic Turkey
• Laertes prepona, a butterfly in Central and South America
• 11252 Laërtes, a trojan asteroid
• HMS Laertes, three British Royal Navy ships
• USS Laertes, a Xanthus-class repair ship in the U.S. Navy from 1945 to 1972