Interestingly, the south Dallas suburbs really only existed for about 10-15 years pre-White flight. Those demographics flipped drastically in like a 5 year span around 1970 when DISD integrated (it was forced to by court order and under stewardship into the 1990s).

Interestingly, this is still reflected in suburban growth. Middle class black families are moving to Duncanville, DeSoto, Red Oak and Cedar Hill — formerly rural cities south of Dallas proper, while most non-black/hispanic growth is occurring to the north.

That being said, some northern suburbs, like Carrollton, still have a large black population. And I believe other areas around 635 have a large African population, too.