Pittsburgh Allderdice HS

Pittsburgh Allderdice HS is one of the roomy secondary schools in Pittsburgh, Pennsylvania, operated by Pittsburgh SD, with 1,386 students on its rolls from grades 9 through 12. Compared to the state average of about 738 students per school, that is 88% bigger than typical.

Pittsburgh SD comprises 56 schools with combined enrollment of 19,211 students; Pittsburgh Allderdice HS is among them.

Demographically, Pittsburgh Allderdice HS records that the largest single group is White at 47%, but no single group is in the majority. The remainder consists of 31% Black, 8% multiracial, 8% Hispanic, 5% Asian. The wider county runs roughly 76% White, putting the school's mix considerably less White than the area baseline.

On the income-and-resources front, Staff filings list 88 full-time-equivalent teachers, which works out to roughly 15.8:1 students per teacher. That figure is higher than the state norm's 12.8:1 average. Around 93% of the student body qualifies for free or reduced-price meals, which schools and policymakers use as a rough income-mix signal. Set against Allegheny County (around 54%), the school's rate is north of typical.

After controlling for student poverty, Pittsburgh Allderdice HS sits in the middle band of the BeatsExpectations distribution. Schools with this campus's student mix typically land near 37.6%; this one delivers 50.9%.

In the surrounding community, Allegheny County reports that median household earnings sit near $78,548, about 46% of the adult population holds a bachelor's degree or above, and census figures put the poverty rate at about 7%. In all, Allegheny County runs 277 public schools (combined enrollment of about 141,392 students), of which Pittsburgh Allderdice HS is one.

Nearest neighbor: Pittsburgh Colfax K-8, around 0.3 miles off. Within five miles, there are 8 other public schools. On composite proficiency, Pittsburgh Allderdice HS comes 4th of 7 in the immediate cluster, above the nearby-schools average of 44.7%.

The campus sits in a high-density setting.

Looking at the recent track record. Pittsburgh Allderdice HS's enrollment has shrank 7% since 2018, when it stood at 1,483 (now 1,386). Over the same period, the Black share shrank from 37% to 31%. Class-load math has rose: from 14.3:1 in 2018 to 15.8:1 in 2025.

Within the allk12 community for this school, posts here usually surface around classroom updates, athletics, and weather closures. Parents, students, alumni, and staff are welcome to weigh in.