Mapped: Income Growth in Every U.S. State Since 2010 See visuals like this from many other data creators on our Voronoi app. Download it for free on iOS or Android and discover incredible data-driven charts from a variety of trusted sources. Montana leads the U.S. with 42.9% growth in real median household income since 2010, nearly double the national average. Several Mountain West and Southern states rank among the fastest-growing, including Tennessee and Kansas.