Rochester High School

Rochester High School, a modestly sized secondary school in Rochester, Illinois, run under Rochester CUSD 3A, educates 692 students, covering grades 9 through 12.

Rochester CUSD 3A comprises 5 schools with combined enrollment of 2,012 students; Rochester High School is among them.

Demographically, Rochester High School shows that the student body is overwhelmingly White (90%); the rest reads as 3% multiracial, 2% Hispanic, 2% Black, 2% Asian. By comparison, Sangamon County as a whole is about 78% White, so the school skews noticeably more White than its surroundings.

On the income-and-resources front, The school reports having 41 full-time-equivalent teachers, for a student-teacher ratio near 16.9:1. The state averages around 13.8:1, so this campus is higher than the state norm typical.

In the area at large, ACS estimates for Sangamon County put median household income runs about $75,357, about 37% of the adult population holds a bachelor's degree or above, and census figures put the poverty rate at about 9%. Rochester High School is one of 77 public schools in Sangamon County (combined enrollment of about 27,345 students).

Nearest neighbor: Rochester Jr High School, around 0.1 miles off. Within five miles, there are 8 other public schools.

Geographically, the school is in a bedroom-community area.

Looking at the recent track record. Looking back 7 years, enrollment at Rochester High School has decreased 10%, going from 766 students in 2018 to 692 in 2025.

Within the allk12 community for this school, 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.