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Hermosillo(ārmōsē`yō), city (1990 pop. 406,417), capital of Sonora state, NW Mexico, at the entrance to the gorge of the Sonora River. Hermosillo is a transportation, manufacturing, and agricultural center in an irrigated area where cereals and cotton are grown and cattle are raised. Established in 1700 as an indigenous town with a Jesuit missionary, the city was later renamed in honor of the Spanish general José María Gonzalez de Hermosillo.
a city in northwestern Mexico. Capital of Sonora State. Population, 207,000 (1974). Hermosillo is an important transportation junction. The center of an irrigation farming region, the city has a cotton-ginning industry and vegetable-oil mills. Hermosillo also has light industries and chemical and building-materials industries. There is a university in Hermosillo.