Cass Jr High School

Located at 8502 Bailey Rd, in Darien, Illinois, Cass Jr High School is a close-knit middle school that hosts 313 students (grades 5 through 8), operated by Cass SD 63. Compared to the state average of about 462 students per school, that is 32% leaner than typical.

Cass SD 63 comprises 2 schools with combined enrollment of 773 students; Cass Jr High School is among them.

On the student-mix side, Cass Jr High School logs that 65% of the student body identifies as White; the rest reads as 13% Asian, 12% Hispanic, 6% multiracial, 4% Black. That composition is broadly in line with DuPage County as a whole.

On the income-and-resources front, The school currently runs with 26 full-time-equivalent teachers, for a student-teacher ratio near 11.8:1. That figure is tighter than the state norm's 13.0:1 average. Roughly 24% of students at Cass Jr High School qualify for free or reduced-price lunch, a number frequently used as a low-income enrollment indicator. Set against DuPage County (around 34%), the school's rate is meaningfully below typical.

With demographic context factored in, Cass Jr High School tracks the demographic baseline. The model predicts 57.7% given the school's FRL share; actual proficiency is 58.5%.

Across the wider county, census data for DuPage County shows median household earnings sit near $112,096, roughly 52% of adults have completed at least a four-year degree, and roughly 5% of residents live below the federal poverty line. Cass Jr High School is one of 277 public schools in DuPage County (combined enrollment of about 138,557 students).

The closest other public school is Concord Elem School, roughly 0.8 miles away. 8 of the 8 nearest public schools sit inside a five-mile radius. On composite proficiency, Cass Jr High School comes 3rd of 7 in the immediate cluster, higher than the nearby-schools average of 53.7%.

The school occupies a bedroom-community site.

Looking at the recent track record. Over the past 7-year window, the student count climbed 7%: 292 students in 2018 compared to 313 in 2025. Over the same period, the Hispanic share ticked up from 7% to 12%. The student-to-teacher ratio narrowed from 15.0:1 in 2018 to 11.8:1 today.

On the community side, the feed for Cass Jr High School typically covers science fair prep, picture-day reminders, and bus-route questions. Anyone with firsthand experience at this school can post or comment.