Williamsville Jr High School

Located at 500 S Walnut St, in Williamsville, Illinois, Williamsville Jr High School is a reasonably sized 6-8 campus that hosts 444 students (grades 5 through 8), overseen by Williamsville CUSD 15.

Within Williamsville CUSD 15, which oversees 3 schools and 1,458 students, Williamsville Jr High School is one campus in the system.

For racial and ethnic makeup, Williamsville Jr High School records that the student body is overwhelmingly White (93%); the rest looks like 4% multiracial, 2% Hispanic. By comparison, Sangamon County as a whole is about 78% White, so the school skews meaningfully more White than its surroundings.

In terms of school funding signals, On paper, Williamsville Jr High School has 31 full-time-equivalent teachers, translating to a class-load average of around 14.3:1. The state averages around 13.0:1, so this campus is higher than the state norm typical. An estimated 18% of students are eligible for free or reduced-price lunch, a number frequently used as a low-income enrollment indicator. By comparison, Sangamon County runs at roughly 48%, so the school's eligibility rate is lower than the surrounding baseline.

Adjusting for the school's free-and-reduced-lunch share, Williamsville Jr High School performs roughly as the BeatsExpectations model predicts for a school with this FRL share. The predicted value is around 61.1%, the actual is 67.8%, a residual of +6.7 points.

In the broader community, ACS estimates for Sangamon County put median household income runs about $75,357, 37% of adults hold a bachelor's degree or higher, and census figures put the poverty rate at about 9%. Across Sangamon County's 77 public schools (combined enrollment of about 27,345 students), Williamsville Jr High School is one campus in the mix.

The closest other public school is Williamsville High School, roughly 0.2 miles away. Counting just inside five miles, 2 other public schools cluster around Williamsville Jr High School. On composite proficiency, Williamsville Jr High School comes 1st of 9 in the immediate cluster, ahead of the nearby-schools average of 48.3%.

The campus sits in a suburban setting.

Five-year trend. Looking back 7 years, enrollment at Williamsville Jr High School has increased 29%, going from 344 students in 2018 to 444 in 2025. The student-to-teacher ratio pulled in from 16.8:1 in 2018 to 14.3:1 today.

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