Tell el-'Oueili (also Awayli; Mesopotamian Arabic: تل العويلي, romanized: Təll əl-ʿOwēli) is a tell, or ancient settlement mound, located in Dhi Qar Governorate, southern Iraq.

The excavations have revealed occupation layers predating those of Eridu, making Tell el-'Oueili the earliest known human settlement in Lower Mesopotamia.

The site was first noted and surveyed by French scholar André Parrot, who at the time was working at nearby Larsa.

3.5 kilometres (2.2 mi) southeast of Larsa in Dhi Qar Governorate, southern Iraq.

The environment of 'Oueili is characterized by temperatures that can reach more than 50 °C in summer and less than 250 mm of annual rainfall, making the area unsuitable for rainfed agriculture.