I think Harlem is still largely Black, as far as the black community goes.

But NYC was maybe the main entrepot for West Indians after they started letting them in in the mid-60's, so there's not really many majority Black neighborhoods anymore. In fact, West Indians replaced white people in certain neighborhoods as they moved in in the 60's and 70's, like Flatbush. The 60 year old Irish co-worker who sits behind me was born and raised in Flatbush when it was all Irish, but his family bounced 40 years ago. As a result, there are lots of majority West Indian neighborhoods.