Pittsburg (pĬts´bərg). 1 Industrial city (1990 pop. 47,564), Contra Costa co., W Calif., on the edge of the San Francisco Bay area, at the junction of the Sacramento and the San Joaquin rivers; laid out 1849, inc. 1903. Manufactures include packaging equipment, construction materials, machinery, chemicals, and industrial glass. Coal was discovered there in 1855 and was mined until 1902. The city's Camp Stoneman (now closed) was an important embarkation point during World War II and the Korean War. 2 City (1990 pop. 17,775), Crawford co., SE Kans., near the Mo. line; founded 1876 as a mining town and named for Pittsburgh, Pa., inc. 1880. It is a mining center near large coal deposits. Clay, limestone, zinc, lead, and oil are also found in the area. The city's industries include transportation and electrical equipment; printing and publishing; chemicals; machinery; and paper, fabricated metal, limestone, clay, and plastic products. Pittsburg State Univ. is there.