Clifford Johnson School

Clifford Johnson School is a medium-sized K-5 school in Warrenville, Illinois, one of the schools within CUSD 200. The school educates 473 students in grades K through 5. That puts it 24% larger than the typical public school in Illinois, which averages around 381 students.

CUSD 200 runs 20 schools in total, collectively educating 11,639 students. Clifford Johnson School is one of those campuses.

Looking at the student body, Clifford Johnson School reports that the most-represented group is Hispanic (55%), with the rest of the student body spread across multiple groups. Other groups include 30% White, 6% Asian, 6% multiracial, 4% Black. By comparison, DuPage County as a whole is about 16% Hispanic, so the school skews noticeably more Hispanic than its surroundings.

On the income-and-resources front, On paper, Clifford Johnson School has 43 full-time-equivalent teachers, translating to a class-load average of around 11.0:1. Statewide, the average ratio sits near 13.9:1, putting Clifford Johnson School tighter than the state norm the norm. Around 63% of the student body qualifies for free or reduced-price meals, a number frequently used as a low-income enrollment indicator. By comparison, DuPage County runs at roughly 34%, so the school's eligibility rate is somewhat above the surrounding baseline.

On a residual basis (actual vs predicted given the student mix), Clifford Johnson School sits in the top 10% of Illinois schools after the BeatsExpectations adjustment. Predicted proficiency for the school's FRL share is roughly 35.1%; actual is 51.0%, +15.9 points clear of the demographic baseline.

In the surrounding community, ACS estimates for DuPage County put median household income runs about $112,096, 52% of adults hold a bachelor's degree or higher, and the poverty rate sits near 5%. Across DuPage County's 277 public schools (combined enrollment of about 138,557 students), Clifford Johnson School is one campus in the mix.

Illinois Youth Center-Warrenville is the nearest neighboring public school, about 1.2 miles from this campus. Counting just inside five miles, 8 other public schools cluster around Clifford Johnson School. Among the 8 schools in that immediate cluster with test data (this one included), Clifford Johnson School ranks 5th on composite proficiency, ahead of the local average of 49.1%.

Geographically, the school is in a commuter-belt area.

Five-year trend. Over the past 7-year window, the student count remained close to its prior level: 463 students in 2018 compared to 473 in 2025. Hispanic enrollment moved from 60% to 55% across the same window. The student-to-teacher ratio pulled in from 13.2:1 in 2018 to 11.0:1 today.

Inside the community feed, posts here usually surface around science fair prep, picture-day reminders, and bus-route questions. Posting is open to anyone connected to the school.