Harry D Jacobs High School

As an expansive high school in Algonquin, Illinois, Harry D Jacobs High School enrolls 2,056 students from grades 9 through 12, operated by CUSD 300. That puts it 147% bigger than the typical public school in Illinois, which averages around 834 students.

CUSD 300 comprises 27 schools with combined enrollment of 20,705 students; Harry D Jacobs High School is among them.

On the student-mix side, Harry D Jacobs High School lists that White students make up the majority at 57%. Beyond that, the school reports 26% Hispanic, 8% Asian, 5% multiracial, 4% Black. That is visibly less White than the county at large, where the share is closer to 80%.

On the resource side, Staff filings list 141 full-time-equivalent teachers, which works out to roughly 14.6:1 students per teacher. The state averages around 13.8:1, so this campus is higher than the state norm typical. Roughly 40% of students at Harry D Jacobs High School qualify for free or reduced-price lunch, a number frequently used as a low-income enrollment indicator.

On a demographically-adjusted basis, Harry D Jacobs High School performs roughly as the BeatsExpectations model predicts for a school with this FRL share. The predicted value is around 48.3%, the actual is 44.0%, a residual of -4.3 points.

Across the wider county, community-level numbers for McHenry County indicate median household income runs about $104,802, 35% of adults hold a bachelor's degree or higher, and the poverty rate sits near 4%. Harry D Jacobs High School is one of 89 public schools in McHenry County (combined enrollment of about 50,123 students).

Lincoln Prairie Elem School is the nearest neighboring public school, about 0.8 miles from this campus. Counting just inside five miles, 8 other public schools cluster around Harry D Jacobs High School. Ranking that nearby cluster on reported proficiency puts Harry D Jacobs High School at 7th of 8; the average score across the group is 56.0%.

Harry D Jacobs High School operates from a suburban location.

Five-year trend. Looking back 7 years, enrollment at Harry D Jacobs High School has fell 5%, going from 2,169 students in 2018 to 2,056 in 2025. The White share of enrollment ticked down from 67% to 57% over that span. Class-load math has tightened: from 16.2:1 in 2018 to 14.6:1 in 2025.

On this page, posts here usually surface around science fair prep, picture-day reminders, and bus-route questions. Contributors range from current parents to recent graduates and teachers.