San Juan del Río

San Juan del Río is a city (2010 census pop. 241,699) and administration of the surrounding San Juan del Río Municipality (pop. 208,462) in the central Mexican state of Querétaro. The population in for the municipality is 268,408 as of 2015. The city and its municipality have the second-highest population in the state. The municipality has an area of 799.9 km2 (308.8 sq mi). The city is located on country's central plateau (altiplano), 50 km (31 mi) southeast of state capital, Santiago de Querétaro, at 20°23′N 99°59′W / 20.383°N 99.983°W / 20.383; -99.983 with an elevation of 1922 m. Although famous for its opals, mined at nearby La Trinidad, it is also an agricultural center (corn, wheat, sugarcane, beans, alfalfa, fruit, and livestock). A number of wineries are also located in the vicinity.