Cumaribo is a town and municipality located in the Department of Vichada, Republic of Colombia.

[1] Cumaribo has a tropical monsoon climate (Köppen Am) with heavy rainfall in all months except January and February.

Cumaribo was officially founded by colonizers led by Jose Nicolino Mattar in 1959 but was inhabited previously by indigenous peoples such as the Guahibo.

The area has been under the influence of the Revolutionary Armed Forces of Colombia (FARC) guerrilla group due to the large production of coca leaves in the region and difficult access for the Military of Colombia.

Tomás Medina Caracas, a prominent FARC commander in charge of the illegal drug trade for this organization was killed on 1 September 2007 in a Colombian Army military operation in eastern Colombia within the municipality of Cumaribo near the border with Venezuela.