Don't take my word for this - I am not an anthropologist, so I might be entirely wrong.
With only a single straight-on view of the skull, I am not entirely sure of the race and gender, but it appears to me to be a black female.
I am saying female due to the sharp upper boundries of the orbits, and a non-robust overall appearance.
I am saying black based on the broad nasal aperture, broad bridge of the nose.
There isn't a good enough view of the cranial sutures, and no teeth to estimate age.
I wish there were a few different views of the skull that were more close-up. I could be more sure.
My first guess would be
I'sha Grier.
https://www.findthemissing.org/en/cases/19596/0
She also has the same broad cheekbones as does this skull. ETA - And when I overlay the images, her facial shape fits the skull quite well.
But she has been missing only five months, so I don't know though, whether she has been missing long enough to be that completely skeletonized.