The 1180s BC is a decade which lasted from 1189 BC to 1180 BC.

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• c. 1188 BC–Late Bronze Age collapse.^[1]
• 1186 BC—End of the Nineteenth dynasty of Egypt, start of the Twentieth Dynasty.
• 1184 BC—April 24, the traditional date of the fall of Troy.
• 1182 BC—A desperate letter of Ammurapi, the last king of Ugarit, reporting the approaching fleet of the Peoples of the Sea. Shortly thereafter they destroyed both Ugarit and Alasiya (Cyprus).
• 1181 BC—Menestheus, legendary King of Athens and veteran of the Trojan War, dies after a reign of 23 years and is succeeded by his nephew Demophon, a son of Theseus. Other accounts place his death a decade earlier and during the Trojan War (see 1190s BC).
• c. 1180 BC—Invaders raze Hattusa, causing the collapse of the Hittite Empire.