South Middle School

South Middle School operates as an expansive middle school in Arlington Heights, Illinois, operated by Arlington Heights SD 25. Current enrollment sits at 812 students spanning grades 6 through 8. By comparison, Illinois's public schools average about 462 students each, so South Middle School sits 76% larger than that benchmark.

Arlington Heights SD 25 comprises 9 schools with combined enrollment of 5,423 students; South Middle School is among them.

Looking at the student body, South Middle School records that the student body is overwhelmingly White (84%); the rest consists of 9% Hispanic, 6% Asian. That is considerably more White than the county at large, where the share is closer to 44%.

On the resource side, The school currently runs with 67 full-time-equivalent teachers, for a student-teacher ratio near 12.1:1. Statewide, the average ratio sits near 13.0:1, putting South Middle School tighter than the state norm the norm. Roughly 16% of students at South Middle School qualify for free or reduced-price lunch, which schools and policymakers use as a rough income-mix signal. That share is noticeably below Cook County's rate of about 66%.

With demographic context factored in, South Middle School sits in the middle band of the BeatsExpectations distribution. Schools with this campus's student mix typically land near 62.5%; this one delivers 65.9%.

Around the school, ACS estimates for Cook County put median household income runs about $83,498, 43% of adults hold a bachelor's degree or higher, and the poverty rate sits near 10%. In all, Cook County runs 1406 public schools (combined enrollment of about 697,934 students), of which South Middle School is one.

The closest other public school is Westgate Elem School, roughly 0.6 miles away. 8 of the 8 nearest public schools sit inside a five-mile radius. On composite proficiency, South Middle School comes 4th of 8 in the immediate cluster, higher than the nearby-schools average of 56.2%.

The school occupies a bedroom-community site.

Over the past 7-year window. Looking back 7 years, enrollment at South Middle School has contracted 10%, going from 904 students in 2018 to 812 in 2025. White enrollment moved from 78% to 84% across the same window. The student-to-teacher ratio pulled in from 13.8:1 in 2018 to 12.1:1 today.

On this page, the feed for South Middle School typically covers science fair prep, picture-day reminders, and bus-route questions. Posting is open to anyone connected to the school.