Affton High School is a public comprehensive high school in Affton, St. Louis County, Missouri that is part of the Affton School District.
Serving 761 students in grades 9-12, Affton High School ranks in the top 50% of all schools in Missouri for overall test scores (math proficiency is bottom 50%, and reading proficiency is bottom 50%).
The percentage of students achieving proficiency in math is 22% (which is lower than the Missouri state average of 40%). The percentage of students achieving proficiency in reading/language arts is 55-59% (which is higher than the Missouri state average of 43%).
The student-teacher ratio of 15:1 is higher than the Missouri state level of 12:1.
Minority enrollment is 32% of the student body (majority Black and Hispanic), which is lower than the Missouri state average of 33% (majority Black).
Quick Facts (2026)
- Grades: 9-12
- Enrollment: 761 students
- Student-Teacher Ratio: 15:1
- Minority Enrollment: 32%
- Graduation Rate: 90-94% (Top 20% in MO)
- Overall Testing Rank: Top 50%
- Math Proficiency: 22% (Btm 50%)
- Reading Proficiency: 55-59% (Top 20%)
- Science Proficiency: 30-34% (Btm 50%)
- Source: National Center for Education Statistics (NCES), MO Dept. of Education
Top Rankings
Affton High School ranks among the top 20% of public schools in Missouri for:
Category
Attribute
Reading/Language Arts Proficiency
Graduation Rate
School Overview
Affton High School's student population of 761 students has stayed relatively flat over five school years.
The teacher population of 51 teachers has stayed relatively flat over five school years.
Grades Offered
Grades 9-12
(No virtual instruction)
(No virtual instruction)
Total Students
761 students
Total Classroom Teachers
51 teachers
Year Founded
1930
Colors
Purple, Gold
School Motto
Capable. Curious. Confident.
School Rankings
Affton High School ranks within the top 50% of all 2,076 schools in Missouri (based off of combined math and reading proficiency testing data).
The diversity score of Affton High School is 0.51, which is less than the diversity score at state average of 0.52. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#1014 out of 2076 schools
(Top 50%)
(Top 50%)
Math Test Scores (% Proficient)
22%
40%
Reading/Language Arts Test Scores (% Proficient)
55-59%
43%
Science Test Scores (% Proficient)
30-34%
38%
Student-Teacher Ratio
15:1
12:1
American Indian
n/a
n/a
Asian
4%
2%
Hispanic
9%
9%
Black
10%
15%
White
68%
67%
Hawaiian
n/a
1%
Two or more races
9%
6%
All Ethnic Groups
Graduation Rate
90-94%
90%
Eligible for Free Lunch
36%
43%
Eligible for Reduced Lunch
6%
7%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), MO Dept. of Education
School Notes
- School Mascot: Cougar
Frequently Asked Questions
What is Affton High School's ranking?
Affton High School is ranked #1014 out of 2,076 schools, which ranks it among the top 50% of public schools in Missouri.
What schools are Affton High School often compared to?
Affton High Schoolis often viewed alongside schools like Bayless Senior High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
22% of students have achieved math proficiency (compared to the 40% MO state average), while 55-59% of students have achieved reading proficiency (compared to the 43% MO state average).
What is the graduation rate of Affton High School?
The graduation rate of Affton High School is 90-94%, which is higher than the Missouri state average of 90%.
How many students attend Affton High School?
761 students attend Affton High School.
What is the racial composition of the student body?
68% of Affton High School students are White, 10% of students are Black, 9% of students are Hispanic, 9% of students are Two or more races, and 4% of students are Asian.
What is the student-teacher ratio of Affton High School?
Affton High School has a student ration of 15:1, which is higher than the Missouri state average of 12:1.
What grades does Affton High School offer ?
Affton High School offers enrollment in grades 9-12 (No virtual instruction).
What school district is Affton High School part of?
Affton High School is part of Affton 101 School District.
School Reviews
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