Serving 2,507 students in grades 9-12, Cosby High School ranks in the top 30% of all schools in Virginia for overall test scores (math proficiency is bottom 50%, and reading proficiency is bottom 50%).
The percentage of students achieving proficiency in math is 65-69% (which is approximately equal to the Virginia state average of 68%). The percentage of students achieving proficiency in reading/language arts is 92% (which is higher than the Virginia state average of 69%).
The student-teacher ratio of 16:1 is higher than the Virginia state level of 14:1.
Minority enrollment is 37% of the student body (majority Black), which is lower than the Virginia state average of 56% (majority Black).
Quick Facts (26-27)
- Grades: 9-12
- Enrollment: 2,507 students
- Student-Teacher Ratio: 16:1
- Minority Enrollment: 37%
- Graduation Rate: 98% (Top 5% in VA)
- Overall Testing Rank: Top 30%
- Math Proficiency: 65-69% (Btm 50%)
- Reading Proficiency: 92% (Top 5%)
- Science Proficiency: 83% (Top 5%)
- Attendance Zone: Cosby High serves the western part of Midlothian, VA, covering an area of approximately 102.7 square miles. Families in this zone typically drive 10-12 minutes to the school, with an average distance of 4.3 miles to the zone's edge and a maximum distance of 10.4 miles to the furthest edge.
- Source: National Center for Education Statistics (NCES), VA Dept. of Education
Top Rankings
Cosby High School ranks among the top 20% of public schools in Virginia for:
Category
Attribute
Reading/Language Arts Proficiency
Science Proficiency
Graduation Rate
School Overview
Cosby High School's student population of 2,507 students has grown by 13% over five school years.
The teacher population of 158 teachers has grown by 29% over five school years.
Grades Offered
Grades 9-12
(Supplemental Virtual)
(Supplemental Virtual)
Total Students
2,507 students
Showing 2016–2025. Full 19-year historical data available below ↓
Total Classroom Teachers
158 teachers
Showing 2016–2025. Full 19-year historical data available below ↓
Year Founded
2007
Average Class Size
21 students
School Rankings
Cosby High School ranks within the top 30% of all 1,773 schools in Virginia (based off of combined math and reading proficiency testing data).
The diversity score of Cosby High School is 0.57, which is less than the diversity score at state average of 0.72. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#453 out of 1773 schools
(Top 30%)
(Top 30%)
Showing 2013–2023. Full 14-year historical data available below ↓
Math Test Scores (% Proficient)
65-69%
68%
Showing 2011–2023. Full 14-year historical data available below ↓
Reading/Language Arts Test Scores (% Proficient)
(20-21)92%
69%
Showing 2011–2021. Full 12-year historical data available below ↓
Science Test Scores (% Proficient)
(20-21)83%
59%
Student-Teacher Ratio
16:1
14:1
Showing 2016–2025. Full 19-year historical data available below ↓
Asian
6%
8%
Showing 2016–2025. Full 19-year historical data available below ↓
Hispanic
9%
20%
Showing 2016–2025. Full 19-year historical data available below ↓
Black
16%
21%
Showing 2016–2025. Full 19-year historical data available below ↓
White
63%
44%
Showing 2016–2025. Full 19-year historical data available below ↓
Two or more races
6%
7%
Showing 2016–2025. Full 15-year historical data available below ↓
All Ethnic Groups
Showing 2016–2025. Full 19-year historical data available below ↓
Graduation Rate
98%
88.8%
Showing 2014–2023. Full 13-year historical data available below ↓
Chronically Absent Students
(22-23)10.2%
19.1%
Eligible for Free Lunch
14%
57%
Eligible for Reduced Lunch
2%
2%
School Statewide Testing
School District Name
Sports
School Mascot
Titans
Source: National Center for Education Statistics (NCES), VA Dept. of Education
Frequently Asked Questions
What is Cosby High School's ranking?
Cosby High School is ranked #453 out of 1,773 schools, which ranks it among the top 30% of public schools in Virginia.
What schools are Cosby High School often compared to?
Cosby High Schoolis often viewed alongside schools like Midlothian High School, Clover Hill High School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
65-69% of students have achieved math proficiency (compared to the 68% VA state average), while 92% of students have achieved reading proficiency (compared to the 69% VA state average).
What is the graduation rate of Cosby High School?
The graduation rate of Cosby High School is 98%, which is higher than the Virginia state average of 88.8%.
How many students attend Cosby High School?
2,507 students attend Cosby High School.
What is the racial composition of the student body?
63% of Cosby High School students are White, 16% of students are Black, 9% of students are Hispanic, 6% of students are Asian, and 6% of students are Two or more races.
What is the student-teacher ratio of Cosby High School?
Cosby High School has a student ration of 16:1, which is higher than the Virginia state average of 14:1.
What grades does Cosby High School offer ?
Cosby High School offers enrollment in grades 9-12 (Supplemental Virtual).
What school district is Cosby High School part of?
Cosby High School is part of Chesterfield County School District.
School Reviews
Review Cosby High School. Reviews should be a few sentences in length. Please include any comments on:
- Quality of academic programs, teachers, and facilities
- Availability of music, art, sports and other extracurricular activities
Recent Articles
When a Public School Cancels a Course Your Child Needs
Learn what parents can do when public schools cancel essential courses, including protecting graduation credits, finding approved alternatives, requesting substitutions, and preventing disruptions to college or career plans before deadlines.
Verify School Assignment Before Buying a House
Before buying a house, learn how to verify your child's assigned public school, check conflicting property listings, confirm enrollment eligibility, and avoid costly school assignment surprises before closing on a property.
School Bus Commute Times: What Parents Should Know
Discover how long school bus commutes really take, why routes vary, and what parents should ask about pickup times, student fatigue, transportation reliability, and daily schedules before choosing schools.
