Larsa was an important city of ancient Sumer; the center of the cult of the sun god Utu. It lies some 25 km southeast of Uruk in Iraq's Dhi Qar Governorate; near the east bank of the Shatt-en-Nil canal at the site of the modern settlement Tell as-Senkereh or Sankarah.

The city became a political force during the Isin-Larsa period (3rd Century BCE).