Counties
Counties in the Wabash Valley include Posey, Gibson, Vigo, Clay, Sullivan, Vermillion, Parke, Greene, Putnam, Owen, Knox, Daviess, Martin, and Fountain, Tipton counties in Indiana. The Illinois portion consists of Clark, Edgar, Crawford, Jasper, Cumberland, Coles, Douglas, Edwards, Wabash, and White, counties. It also may or may not include, depending on the source, Monroe, Montgomery, Tippecanoe, and Warren counties in Indiana, and Lawrence, Richland, Vermillion, Champaign, Clay, and Effingham counties in Illinois.
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