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Alton High School

4200 Humbert Rd, Alton, IL 62002

CSchola Grade
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Grades
9–12
High
Students
1,823
Enrolled 2024–25
Students per teacher
18.5 : 1
Full-time teachers
District
Alton CUSD 11
Madison County

Schola Grade C · Average

Letter grade (A–F) · compared with 684 Illinois high schools · How we grade
Test scores22% proficient in math & reading
49thpercentile
Equity12% of low-income students proficient
51stpercentile
Attendance40% chronically absent
29thpercentile
Graduation rate76% graduate in 4 years
14thpercentile
College readinessAt least 68% take AP, IB or dual-enrollment courses
99thpercentile
Class size18.5 students per teacher
4thpercentile

Percentiles compare this school with other Illinois high schools; the line marks the middle. Data: test scores 2021–22, graduation and absenteeism 2022–23 (U.S. Department of Education, EDFacts); coursework 2023–24 (Civil Rights Data Collection); staffing 2024–25 (NCES).

About Alton High School

Alton High School is a public high school in Alton, Illinois, serving grades 9–12. It is part of Alton CUSD 11. The school is located in a small suburb in Madison County.

In the 2024–25 school year, 1,823 students were enrolled, with about 18.5 students for every full-time teacher. That ratio is larger than the typical Illinois high school (13.3 students per teacher). Its Schola Grade is C (average), compared with 684 Illinois high schools.

Grades & enrollment

Students per grade, 2024–25Grades 9–12

Location & nearby schools

4200 Humbert Rd
Alton, IL 62002
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School details

Type
Public School · What this means
Level
High
Grades offered
9–12
Enrollment (2024–25)
1,823 students
Students per teacher
18.5 to 1
AP courses offered
26
Charter school
No
Magnet school
No
Locale
Suburb — Small
School district
Alton CUSD 11
County
Madison County
NCES school ID
170360000035

Schools near Alton High School

All 12 schools in Alton →

School data comes from the U.S. Department of Education: the National Center for Education Statistics (NCES) Common Core of Data and EDGE school locations (2024–25) and Private School Survey (2023–24), the Civil Rights Data Collection (2023–24), and EDFacts (test results 2021–22; graduation and chronic absenteeism 2022–23), plus other public sources. Please contact the school to confirm enrollment, programs, and other details. How we source data.