Banco de Occidente is one of the largest Colombian banks.

It is part of the Grupo Aval conglomerate of financial services in Colombia, owned by the country tycoon of finances, Luis Carlos Sarmiento Angulo (Ranked 285 on the 2009 forbes list of world billionaires).

[2] Banco de Occidente began operations as a commercial banking corporation, duly incorporated, on May 3, 1965, under the administration of the first manager, Mr. Alfonso Díaz.

Its orientation and scope initially maintained a regional tone during the first years, a period during which the development of the banking sector was really slow.

The first offices outside Cali were opened in Palmira, Pereira and Armenia.