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Rioja, La(lä rēō`hä), autonomous community (2011 pop. 321,173), 1,948 sq mi (5,045 sq km), N Spain, coextensive with La Rioja prov. A fertile region, it is famous for its fine wines, which are produced chiefly between Logroño and Haro in the upper Ebro Valley.
province in western Argentina, in the foothills of the Andes. Area, 92,300 sq km. Population, 136,000 (1970). Administrative center, La Rioja. The economy is based on extensive animal husbandry; there is viticulture in the foothills. Agricultural raw materials are processed in La Rioja.