sentences:  Fountain County's northern and western borders are defined by the Wabash River which flows out of Tippecanoe County to the northeast.According to the 2010 census, the county has a total area of , of which (or 99.44%) is land and (or 0.56%) is water.Elevations range from above sea level in the northeastern part of the county to in the southwest where the Wabash River leaves the county.