Lewis S. Mills High School is a public high school in Burlington, Connecticut. The school is part of Connecticut Regional School District 10 and serves the two towns of Burlington and Harwinton, which border one another.
Serving 614 students in grades 9-12, Lewis S. Mills High School ranks in the top 30% of all schools in Connecticut for overall test scores (math proficiency is top 50%, and reading proficiency is top 50%).
The percentage of students achieving proficiency in math is 50-54% (which is higher than the Connecticut state average of 41%). The percentage of students achieving proficiency in reading/language arts is 70-74% (which is higher than the Connecticut state average of 50%).
The student-teacher ratio of 11:1 is lower than the Connecticut state level of 12:1.
Minority enrollment is 35% of the student body (majority Hispanic), which is lower than the Connecticut state average of 54% (majority Hispanic).
Quick Facts (2026)
- Grades: 9-12
- Enrollment: 614 students
- Student-Teacher Ratio: 11:1
- Minority Enrollment: 35%
- Graduation Rate: ≥95% (Top 10% in CT)
- Overall Testing Rank: Top 30%
- Math Proficiency: 50-54% (Top 50%)
- Reading Proficiency: 70-74% (Top 20%)
- Science Proficiency: 55-59% (Top 50%)
- Source: National Center for Education Statistics (NCES), CT Dept. of Education
Top Rankings
Lewis S. Mills High School ranks among the top 20% of public schools in Connecticut for:
Category
Attribute
Reading/Language Arts Proficiency
Graduation Rate
Student Attention
School Overview
Lewis S. Mills High School's student population of 614 students has declined by 12% over five school years.
The teacher population of 54 teachers has stayed relatively flat over five school years.
Grades Offered
Grades 9-12
(Supplemental Virtual)
(Supplemental Virtual)
Total Students
614 students
Total Classroom Teachers
54 teachers
Year Founded
1962
Colors
White, Blue
School Calendar
School Rankings
Lewis S. Mills High School ranks within the top 30% of all 939 schools in Connecticut (based off of combined math and reading proficiency testing data).
The diversity score of Lewis S. Mills High School is 0.51, which is less than the diversity score at state average of 0.68. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#257 out of 939 schools
(Top 30%)
(Top 30%)
Math Test Scores (% Proficient)
50-54%
41%
Reading/Language Arts Test Scores (% Proficient)
70-74%
50%
Science Test Scores (% Proficient)
55-59%
47%
Student-Teacher Ratio
11:1
12:1
American Indian
n/a
n/a
Asian
1%
5%
Hispanic
10%
32%
Black
n/a
12%
White
65%
46%
Hawaiian
n/a
n/a
Two or more races
24%
5%
All Ethnic Groups
Graduation Rate
≥95%
89%
Eligible for Free Lunch
11%
38%
Eligible for Reduced Lunch
4%
6%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), CT Dept. of Education
School Notes
- School Mascot: Spartan
Frequently Asked Questions
What is Lewis S. Mills High School's ranking?
Lewis S. Mills High School is ranked #257 out of 939 schools, which ranks it among the top 30% of public schools in Connecticut.
What percent of students have achieved state testing proficiency in math and reading?
50-54% of students have achieved math proficiency (compared to the 41% CT state average), while 70-74% of students have achieved reading proficiency (compared to the 50% CT state average).
What is the graduation rate of Lewis S. Mills High School?
The graduation rate of Lewis S. Mills High School is 95%, which is higher than the Connecticut state average of 89%.
How many students attend Lewis S. Mills High School?
614 students attend Lewis S. Mills High School.
What is the racial composition of the student body?
65% of Lewis S. Mills High School students are White, 24% of students are Two or more races, 10% of students are Hispanic, and 1% of students are Asian.
What is the student-teacher ratio of Lewis S. Mills High School?
Lewis S. Mills High School has a student ration of 11:1, which is lower than the Connecticut state average of 12:1.
What grades does Lewis S. Mills High School offer ?
Lewis S. Mills High School offers enrollment in grades 9-12 (Supplemental Virtual).
What school district is Lewis S. Mills High School part of?
Lewis S. Mills High School is part of Regional School District 10.
School Reviews
5 10/10/2025
There are so many nice teachers and its a safe environment
Review Lewis S. Mills High School. Reviews should be a few sentences in length. Please include any comments on:
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