https://www.independent.co.uk/news/world/americas/barracoon-...
(He died in 1935.)
> 100-odd years seems pretty recent, it’s incredible to me that there were slaves so recently in the US.
That's a taboo line of inquiry in the US. In general, the line is to agree that slavery happened in the very distant past, so the institution cannot possibly affect the present.
Edited to indicate this person was the last enslaved person brought to the US from Africa, not the last enslaved person in the US.