ChartsEconomic maps The ratio of the average income of the richest 20% to the poorest 20% September 21, 2015 Alex This post may contain affiliate links. As an Amazon Associate, we earn from qualifying purchases. Related Posts:The Richest Person in Every US StateThe richest person in every U.S. state, by industryThe most viral video in each U.S. stateThe Most Affordable ZIP Codes to Buy Property in…The Wealthiest and Poorest County in Every U.S. StateSex Ratio by U.S. CountyIncome Needed to be in the Top 1% in Each U.S. StateHousehold Income in the United States Mapped