The Akkadian Empire () or kingdom of Akkad/Agade was an ancient kingdom, often thought to be the first known empire, succeeding the long-lived city-states of Sumer. Centered on the city of Akkad ( or ) and its surrounding region in modern-day Iraq, the empire united the Semitic Akkadian and Sumerian speakers under one rule and exercised significant influence across Mesopotamia, the Levant, modern-day Iran and Anatolia, sending military expeditions as far south as Dilmun and Magan (modern United Arab Emirates, Saudi Arabia, Bahrain, Kuwait, Qatar and Oman) in the Arabian Peninsula.
Established by Sargon of Akkad after defeating the Sumerian king Lugal-zage-si, it replaced the system of independent Sumero-Akkadian city-states and unified a vast region, stretching from the Mediterranean to Iran and from Anatolia to the Persian Gulf, under a centralized government. Sargon and his successors, especially his grandson Naram-Sin, expanded the empire through military conquest, administrative reforms, and cultural integration. Naram-Sin took the unprecedented step of declaring himself a living god and adopted the title "King of the Four Quarters." The Semitic Akkadian language became the empire’s lingua franca, although Sumerian (a language isolate) remained important in religion and literature. The empire was documented through inscriptions, administrative tablets, and seals, including notable sources like the Bassetki Statue. Enheduanna, Sargon’s daughter, served as high priestess and is recognized as the first known named author in history.