HARRISBURG, a city in the rich agricultural and coal mining region of southern Illinois, U.S.A.; the county seat of Saline county. It is on Federal highway 45, and is served by the Big Four and the Southern Illinois Railway and Power company railways. The population was 7,125 in 1920 (9o% native white), and was 11,625 in 1930 by the Federal census. The city has flour mills, brick and tile works, saw and planing mills. It was settled about 1840 and incorporated in 1876.