Marissa Jr & Sr High School

Marissa Jr & Sr High School operates as a minimally staffed senior high in Marissa, Illinois, operated by Marissa CUSD 40. Current enrollment sits at 226 students spanning grades 7 through 12. Compared to the state average of about 834 students per school, that is 73% below typical.

Marissa CUSD 40 runs 2 schools in total, collectively educating 492 students. Marissa Jr & Sr High School is one of those campuses.

In terms of who attends, Marissa Jr & Sr High School lists that the student body is overwhelmingly White (86%). Other groups include 7% multiracial, 5% Hispanic. The wider county runs roughly 60% White, putting the school's mix considerably more White than the area baseline.

On the resource side, On paper, Marissa Jr & Sr High School has 23 full-time-equivalent teachers, translating to a class-load average of around 9.8:1. That figure is tighter than the state norm's 13.8:1 average. Around 60% of the student body qualifies for free or reduced-price meals, often used as a Title I proxy.

On a demographically-adjusted basis, Marissa Jr & Sr High School performs roughly as the BeatsExpectations model predicts for a school with this FRL share. The predicted value is around 37.0%, the actual is 39.4%, a residual of +2.4 points.

In the surrounding community, St. Clair County reports that median household income runs about $73,854, about 32% of the adult population holds a bachelor's degree or above, and roughly 10% of residents live below the federal poverty line. In all, St. Clair County runs 96 public schools (combined enrollment of about 40,879 students), of which Marissa Jr & Sr High School is one.

Marissa Elem School is the nearest neighboring public school, about 0.8 miles from this campus. 8 of the 8 nearest public schools sit inside a ten-mile radius, suggesting a relatively low-density school footprint. On composite proficiency, Marissa Jr & Sr High School comes 5th of 9 in the immediate cluster, below the nearby-schools average of 42.6%.

Geographically, the school is in an outlying area.

Looking at the recent track record. Marissa Jr & Sr High School's enrollment has decreased 11% since 2018, when it stood at 255 (now 226). Over the same period, the White share ticked down from 96% to 86%. Class-load math has pulled in: from 11.3:1 in 2018 to 9.8:1 in 2025.

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