US places with the Sharpest demographical/economical divides

[thebeloitmoderate]

We all know for St Louis if you go north of Delmar the neighborhood is nearly all African American same thing for Kansas City east of Troost and famously but gentrifying DC east of the Anacostia river. 

[thebeloitmoderate]

In PG county MD depending on the 295 Beltway if you are inside the beltway it is a continuation of Southeast/Northeast DC east of the river if you are outside the beltway it is a mostly affluent majority black area with a mix of wealthy neighborhoods and rural forested areas.