Century Jr/Sr High School

Century Jr/Sr High School is a micro-enrollment 9-12 campus in Ullin, Illinois, operated by Century CUSD 100. The school caters to 146 students in grades 6 through 12. Compared to the state average of about 834 students per school, that is 82% below typical.

Century Jr/Sr High School is one of 2 schools operated by Century CUSD 100, a district that works with 331 students overall.

For racial and ethnic makeup, Century Jr/Sr High School reports that 86% of students identify as White, making the school strongly White-majority; the rest comes out to 7% Black, 6% multiracial. The wider county runs roughly 62% White, putting the school's mix noticeably more White than the area baseline.

On the resource side, On paper, Century Jr/Sr High School has 16 full-time-equivalent teachers, translating to a class-load average of around 9.3:1. That figure is tighter than the state norm's 13.8:1 average. About 62% of enrolled students meet the income threshold for free or reduced-price lunch, a commonly cited indicator of low-income enrollment. Set against Pulaski County (around 81%), the school's rate is somewhat below typical.

With demographic context factored in, Century Jr/Sr High School performs roughly as the BeatsExpectations model predicts for a school with this FRL share. The predicted value is around 35.9%, the actual is 25.3%, a residual of -10.7 points.

Zooming out to the county, community-level numbers for Pulaski County indicate median household income runs about $42,463, roughly 13% of adults have completed at least a four-year degree, and the poverty rate sits near 17%. In all, Pulaski County runs 5 public schools (combined enrollment of about 750 students), of which Century Jr/Sr High School is one.

Century Elementary School is the nearest neighboring public school, about 0.1 miles from this campus. Within ten miles, there are 5 other public schools, a sparser pattern than typical urban areas. Ranking that nearby cluster on reported proficiency puts Century Jr/Sr High School at 4th of 8; the average score across the group is 21.3%.

Geographically, the school is in an outlying area.

Trend over the last 7 years. Over the past 7-year window, the student count edged down 35%: 226 students in 2018 compared to 146 in 2025. The Black share of enrollment fell from 13% to 7% over that span. Class-load math has tightened: from 15.8:1 in 2018 to 9.3:1 in 2025.

Within the allk12 community for this school, the feed for Century Jr/Sr High School typically covers enrollment questions, classroom assignments, and PTA news. The community welcomes input from current and former families.