Autonomous region of central Spain; area 94,100 sq km/36,323 sq mi; population (1986) 2,600,000. It includes the provinces of Avila, Burgos, Leon, Palencia, Salamanca, Segovia, Soria, Valladolid, and Zamora. Irrigated land produces wheat and rye. Cattle, sheep, and fighting bulls are bred in the uplands.