It’s no secret that the disparity in wealth is growing. This inequality manifests itself geographically; in most cities, the rich tend to cluster in opulent neighborhoods while poorer families live in more affordable areas. Here, I’ve mapped the median household income by census tract for nine counties (labeled by the largest city in the county). I selected cities that highlight the remarkable degree of economic segregation that can occur.

Data source: http://factfinder.census.gov/faces/nav/jsf/pages/index.xhtml (ACS 2013, 5-yr, B19013)