Wilmington High School

Wilmington High School is a tight-knit high school in Wilmington, Illinois, operated by Wilmington CUSD 209U. The school hosts 432 students in grades 9 through 12. Compared to the state average of about 834 students per school, that is 48% below typical.

Within Wilmington CUSD 209U, which oversees 4 schools and 1,261 students, Wilmington High School is one campus in the system.

In terms of who attends, Wilmington High School reports that the student body is overwhelmingly White (81%); the rest comes out to 16% Hispanic, 3% multiracial. By comparison, Will County as a whole is about 62% White, so the school skews meaningfully more White than its surroundings.

Looking at the economic backdrop, Wilmington High School reports 30 full-time-equivalent teachers, putting the student-to-teacher ratio at about 14.6:1. Statewide, the average ratio sits near 13.8:1, putting Wilmington High School higher than the state norm the norm. Around 44% of the student body qualifies for free or reduced-price meals, which schools and policymakers use as a rough income-mix signal.

After controlling for student poverty, Wilmington High School tracks the demographic baseline. The model predicts 46.3% given the school's FRL share; actual proficiency is 40.7%.

Zooming out to the county, ACS estimates for Will County put the typical household earns roughly $109,984 per year, 38% of adults hold a bachelor's degree or higher, and roughly 6% of residents live below the federal poverty line. In all, Will County runs 209 public schools (combined enrollment of about 113,008 students), of which Wilmington High School is one.

Nearest neighbor: Wilmington Middle School, around 0.4 miles off. Counting just inside five miles, 4 other public schools cluster around Wilmington High School. Among the 8 schools in that immediate cluster with test data (this one included), Wilmington High School ranks 7th on composite proficiency, behind the local average of 51.4%.

Wilmington High School operates from a countryside location.

Looking at the recent track record. Looking back 7 years, enrollment at Wilmington High School has decreased 7%, going from 465 students in 2018 to 432 in 2025. Over the same period, the Hispanic share expanded from 3% to 16%.

On this page, members of the Wilmington High School community share and discuss fundraisers, lost-and-found posts, and report-card season. Anyone with firsthand experience at this school can post or comment.