Bloomsburg is a town in Columbia County, Pennsylvania, 40 miles (64 km) southwest of Wilkes Barre along the Susquehanna River. In 1900, the population of Bloomsburg stood at 6,170; in 1910, 7,413; in 1940, 9,799, and in 1990, 12,439. The population was 12,375 at the 2000 census. It is the county seat of Columbia County and the only incorporated town in Pennsylvania. Bloomsburg is one of two principal communities of the Bloomsburg–Berwick Micropolitan Statistical Area, a micropolitan area that covers Columbia and Montour counties and had a combined population of 82,387 at the 2000 census.