Riverdale Sr High School

Set in Port Byron, Illinois, Riverdale Sr High School is a minimally staffed 9-12 campus, overseen by Riverdale CUSD 100. It enrolls 324 students across grades 9 through 12. Compared to the state average of about 834 students per school, that is 61% smaller than typical.

Riverdale Sr High School is one of 3 schools operated by Riverdale CUSD 100, a district that works with 1,095 students overall.

In terms of who attends, Riverdale Sr High School records that the student body is overwhelmingly White (89%). The remainder comes out to 6% Hispanic, 4% multiracial. The wider county runs roughly 72% White, putting the school's mix visibly more White than the area baseline.

In terms of school funding signals, The school employs 27 full-time-equivalent teachers, for a student-teacher ratio near 11.9:1. The state averages around 13.8:1, so this campus is tighter than the state norm typical. An estimated 16% of students are eligible for free or reduced-price lunch, which schools and policymakers use as a rough income-mix signal. Set against Rock Island County (around 65%), the school's rate is somewhat below typical.

Adjusting for the school's free-and-reduced-lunch share, Riverdale Sr High School tracks the demographic baseline. The model predicts 62.3% given the school's FRL share; actual proficiency is 51.9%.

In the broader community, ACS estimates for Rock Island County put median household earnings sit near $67,159, roughly 25% of adults have completed at least a four-year degree, and roughly 11% of residents live below the federal poverty line. Riverdale Sr High School is one of 57 public schools in Rock Island County (combined enrollment of about 21,921 students).

The closest other public school is Riverdale Elem School, roughly 0.2 miles away. 3 of the 8 nearest public schools sit inside a five-mile radius. Ranking that nearby cluster on reported proficiency puts Riverdale Sr High School at 7th of 9; the average score across the group is 67.2%.

Riverdale Sr High School operates from an outlying location.

Trend over the last 7 years. Riverdale Sr High School's enrollment has held roughly steady since 2018, when it stood at 329 (now 324). Hispanic enrollment moved from 1% to 6% across the same window. Class-load math has fell: from 13.2:1 in 2018 to 11.9:1 in 2025.

Inside the community feed, recent activity here tends to focus on fundraisers, lost-and-found posts, and report-card season. Posting is open to anyone connected to the school.