Sullivan High School

As a reasonably sized secondary school in Chicago, Illinois, Sullivan High School instructs 762 students from grades 9 through 12, operated by Chicago Public Schools Dist 299.

Across the 622 schools in Chicago Public Schools Dist 299 (324,396 students total), Sullivan High School accounts for its share of the district's footprint.

Demographically, Sullivan High School shows that 36% of students identify as Hispanic, with the remaining enrollment distributed across several groups. Beyond that, the school lists 31% Black, 16% White, 11% Asian, 5% multiracial. By comparison, Cook County as a whole is about 27% Hispanic, so the school skews meaningfully more Hispanic than its surroundings.

On the resource side, The school currently runs with 59 full-time-equivalent teachers, for a student-teacher ratio near 12.9:1. That figure is tighter than the state norm's 13.8:1 average. Around 78% of the student body qualifies for free or reduced-price meals, a commonly cited indicator of low-income enrollment. By comparison, Cook County runs at roughly 66%, so the school's eligibility rate is somewhat above the surrounding baseline.

Adjusting for the school's free-and-reduced-lunch share, On a poverty-adjusted basis, Sullivan High School sits in the bottom 10% statewide. Predicted proficiency from the FRL regression is roughly 26.7%; actual is 11.0%, a gap of -15.8 points.

Zooming out to the county, census data for Cook County shows median household earnings sit near $83,498, roughly 43% of adults have completed at least a four-year degree, and roughly 10% of residents live below the federal poverty line. Across Cook County's 1406 public schools (combined enrollment of about 697,934 students), Sullivan High School is one campus in the mix.

The closest other public school is Kilmer Elem School, roughly 0.1 miles away. Counting just inside five miles, 8 other public schools cluster around Sullivan High School. Ranking that nearby cluster on reported proficiency puts Sullivan High School at 9th of 9; the average score across the group is 35.2%.

The school occupies a downtown site.

Looking at the recent track record. Over the past 7-year window, the student count increased 4%: 730 students in 2018 compared to 762 in 2025. The Black share of enrollment shrank from 42% to 31% over that span. Class-load math has fell: from 20.1:1 in 2018 to 12.9:1 in 2025.

On the community side, the feed for Sullivan High School typically covers enrollment questions, classroom assignments, and PTA news. The community welcomes input from current and former families.