Southwestern Indiana
Southwestern Indiana is an 11-county region of southern Indiana, United States located at the southernmost and westernmost part of the state. As of the 2010 census, the region's combined population is 474,251. Evansville, Indiana's third largest city, is the primary hub for the region as well as the primary regional hub for a tri-state area which includes Kentucky and Illinois. Other regional hubs include Jasper, Vincennes, and Washington.
Geography
Southwestern Indiana's topography is considerably more varied and complex than most of Indiana, including large tracts of forest, marshes, rolling fields, large flat valleys in the west and south, to several chains of low mountains, high hills, and sharp valleys towards the north and east. Every county in Southwestern Indiana is bounded by a river at one point, whether it be by the Wabash River along the west, The Ohio River by the south, the White River, dividing the six northern counties between its two forks, or other smaller rivers. More than 50% of the boundaries of Daviess, Gibson, Knox, Perry, Posey, and Spencer counties are dictated by a river or a creek. Eighty percent of Knox County's boundaries are dictated by either the Wabash River or the White River. Additionally, over half of the area is located within the Wabash Valley Seismic Zone.