Tejo, until 2009 named Ribatejo, is a Portuguese wine region covering the same areas as the Ribatejo Province. It takes its name from the river Tejo (Tagus). The entire region is entitled to use the Vinho Regional designation Tejo VR, while some areas are also classified at the higher Denominação de Origem Controlada (DOC) level under the designation DoTejo DOC.[1][2] VR is similar to the French vin de pays and DOC to the French AOC.
Located between the Lisboa and Alentejo VRs, the region is dominated by the influence of the Tagus river. The river moderates the region's climate, making it more temperate than other areas of Portugal. Vineyards are planted on the fertile alluvial plains along the river and can be prone to producing excessive yields.[3]
In 2009, the region was renamed from Ribatejo to Tejo, the same name as the river flowing through the region, as part of a drive to increase the wine region's international reputation.[4][5] However, the DOC has kept its name Ribatejo, which removed the previous problem of having the same name applied to wines at two different levels of classification.