sentences:  According to the 2010 census, the county has a total area of , of which (or 99.53%) is land and (or 0.47%) is water.Elevations in the county range from above sea level where the Wabash River enters Vermillion County to in northeastern Prairie Township.The landscape consists mostly of flat or gently sloping moraine overlaying silty and loamy glacial till, except along the Wabash River where sand, gravel, sandstone and shale are exposed.