Median household income differences are greatest in the Rapid City metropolitan area, compared to more rural parts of the Black Hills. As depicted in this interactive map, data from the 2010 U.S. Census reveals that the region's highest income tracts are on the south and western sides of the Rapid City metro area. The lowest income areas are to the north and east of downtown and on the Pine Ridge Indian Reservation. This data aligns with national studies of income inequality that show that income differences are highest in urban areas.