The Orinoco Belt is a territory in the southern strip of the eastern Orinoco River Basin in Venezuela which overlies the world's largest deposits of petroleum. Its local Spanish name is Faja Petrolífera del Orinoco (Orinoco Petroleum Belt).

The Orinoco Belt is located Guárico and south of the Anzoátegui, Monagas, and Delta Amacuro states, and it follows the line of the river. It is approximately 600 kilometres (370 mi) from east to west, and 70 kilometres (43 mi) from north to south, with an area about 55,314 square kilometres (21,357 sq mi).