Oswego High School
Oswego, IL · High School · Grades 9-12
Oswego High School is a high school in Oswego, IL with 2,901 students enrolled and a 50% proficiency rate. Part of Cusd 308. NCES data from the U.S. Department of Education.
Get Oswego High School's new scores when they post
We'll email you the moment Oswego High School changes. No spam — only real updates.
About This School
Oswego High School is a high school located in Oswego, Illinois. The school serves 2,901 students in grades 9-12. The student-to-teacher ratio is 16.3:1.
According to EDFacts assessment data, 50% of students meet grade-level proficiency standards in combined math and reading. The school reports a 81% graduation rate.
30% of students qualify for free or reduced-price lunch.
Oswego High School is part of the Cusd 308 in Illinois.
How This School Compares
Oswego High School has 2,901 students enrolled, making it larger than the average school in Cusd 308 (807 students). Its 50% proficiency rate is 6 percentage points below the district average of 57%. Compared to the Illinois state average of 48%, the school performs 2 points higher.
Frequently Asked Questions
Oswego High School has 2,901 students enrolled in grades 9-12. The student-to-teacher ratio is 16.3:1.
According to EDFacts data, 50% of students at Oswego High School meet grade-level proficiency standards in combined math and reading assessments.
Oswego High School has a 81% graduation rate, measuring the percentage of students who graduate within four years.
Oswego High School is part of the Cusd 308 in Oswego, Illinois. You can view all schools in this district on the district page.
All data on this page comes from the National Center for Education Statistics (NCES) Common Core of Data and EDFacts assessment results. These are official federal datasets published by the U.S. Department of Education.
School profiles are built from NCES directory data and EDFacts assessment results. Proficiency rates reflect combined math and reading performance. Graduation rates are reported for high schools with available data.
The this entity record above pulls directly from NCES Common Core of Data and EDFacts. What follows is the per-entity context — how this entity sits in the broader U.S. K-12 school outcomes and enrollment distribution and which underlying factors drive the headline numbers.
The methodology behind every numeric value on this page is publicly documented on the NCES Common Core of Data and EDFacts portal and described in detail on this site’s methodology page. Refresh cadence varies by underlying series; the page surfaces the as-of date for each number so readers can trace any figure back to the source release.
Practical use of this page is in combination with the comparison and ranking pages elsewhere on the site, which surface the same data for this entity’s peers within U.S. public schools and districts. A single-entity reading without peer context can be misleading when an entity is an outlier on one axis but typical on another.
Source: NCES Common Core of Data, 2026.