- Bermejo is a city in the Tarija Department of southwestern Bolivia. It is located on the banks of the Bermejo River, near the border with Argentina. The city serves as an important commercial and transportation hub in the region, with a population of around 38,000 people. Bermejo is known for its wine production and is surrounded by vineyards and wineries. The city also has historical sites, such as the San Juan Bautista Church and the Casa de la Cultura, which showcases local art and culture.