Troy. 1 City (1990 pop. 13,051), seat of Pike co., SE Ala., on the Conecuh River; inc. 1843. Products include lumber and wood items, textiles, truck bodies, feed, plastics, and pecans. Troy Univ. and the county museum are there.
2 City (1990 pop. 72,884), Oakland co., SE Mich., a suburb of Detroit; settled 1821, inc. 1955. Major suburban development and residential growth occurred in the city after 1975, as urban migration from Detroit became extensive. Its varied manufactures include automobiles and automobile parts, electronics, chemicals, and door systems. Troy contains many historic buildings and is the site of Walsh College.
3 City (1990 pop. 54,269), seat of Rensselaer co., E N.Y., on the east bank of the Hudson River; inc. 1816. Once known especially for its manufacture of collars and shirts, it now produces motor vehicle parts, garden tillers, instruments, and railroad supplies. Henry Hudson explored (1609) the area near Troy, and the site was included in the patroonship given to Kiliaen Van Rensselaer by the Dutch West India Company. The town was laid out in 1786. From 1812 to 1920 it was industrially prosperous and many inventions were made there. In the second half of the 20th cent. Troy suffered from the urban blight of many river towns and lost a large number of its industries. It is the seat of Rensselaer Polytechnic Institute, Russell Sage College, and the Emma Willard School. Samuel Wilson of Troy, who was concerned with army beef supply in the War of 1812, is said to have been the original "Uncle Sam." Many buildings of architectural and historic interest are preserved.
4 City (1990 pop. 19,478), seat of Miami co., W central Ohio, on the Great Miami River, in a farm area; inc. 1814. Welding machinery, food-processing equipment, motor generators, paper products, and tools are manufactured. Growth and industrialization came with the arrival of the Miami and Erie Canal in 1837. A disastrous flood in 1913 resulted in the creation of the first flood protection district in the United States.
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