That’s TOTAL population figures (including Retirees). Public school attendance figures have white students in the VERY low single digits with the schools being mostly black & Hispanic.
If it’s anything like Los Angeles, most of the White kids are in private schools. I’ve been teaching 14 years here and I have had fewer than 10 non-Hispanic White kids.
Harrisburg had a large white ethnic Catholic population (although a lot of them have left the city.) Those that remain go to Parish grade schools, or to Bishop McDevitt, which is one of the largest high schools in PA. Jewish kids go to the Harrisburg Academy. Very few white kids are in public school.