Marengo High School

Located at 110 Franks Rd, in Marengo, Illinois, Marengo High School is a close-knit senior high that instructs 685 students (grades 9 through 12), operated by Marengo CHSD 154.

Marengo CHSD 154 is the operating authority for Marengo High School, handling staffing, calendars, and reporting to the state department of education.

Looking at the student body, Marengo High School lists that 67% of the student body identifies as White. Beyond that, the school shows 29% Hispanic, 2% multiracial. That is meaningfully less White than the county at large, where the share is closer to 80%.

Looking at school resources, On paper, Marengo High School has 47 full-time-equivalent teachers, translating to a class-load average of around 14.5:1. The state averages about 13.8:1, putting this campus right in line with peers. Around 32% of the student body qualifies for free or reduced-price meals, a number frequently used as a low-income enrollment indicator.

After controlling for student poverty, Marengo High School sits in the middle band of the BeatsExpectations distribution. Schools with this campus's student mix typically land near 53.2%; this one delivers 44.8%.

In the surrounding community, community-level numbers for McHenry County indicate median household earnings sit near $104,802, roughly 35% of adults have completed at least a four-year degree, and the poverty rate sits near 4%. In all, McHenry County runs 89 public schools (combined enrollment of about 50,123 students), of which Marengo High School is one.

The closest other public school is Ulysses S Grant Intermediate Sch, roughly 0.4 miles away. 4 of the 8 nearest public schools sit inside a five-mile radius. Among the 9 schools in that immediate cluster with test data (this one included), Marengo High School ranks 7th on composite proficiency, below the local average of 52.3%.

The campus sits in a town-center setting.

Looking at the recent track record. Over the past 7-year window, the student count held roughly steady: 685 students in 2018 compared to 685 in 2025. Over the same period, the White share declined from 77% to 67%.

On this page, members of the Marengo High School community share and discuss open house dates, ride-share offers, and field-trip permission slips. Anyone with firsthand experience at this school can post or comment.