Islesboro Central School is a public K-12 school located in Islesboro, Maine, United States. It is the only school on the island.
Serving 64 students in grades Kindergarten-12, Islesboro Central School ranks in the top 10% of all schools in Maine for overall test scores (math proficiency is top 10%, and reading proficiency is top 10%).
The percentage of students achieving proficiency in math is 70-79% (which is higher than the Maine state average of 49%). The percentage of students achieving proficiency in reading/language arts is ≥90% (which is higher than the Maine state average of 84%).
The student-teacher ratio of 5:1 is lower than the Maine state level of 11:1.
Minority enrollment is 2% of the student body (majority Black), which is lower than the Maine state average of 15% (majority Black).
Quick Facts (2026)
- Grades: Kindergarten-12
- Enrollment: 64 students
- Student-Teacher Ratio: 5:1
- Minority Enrollment: 2%
- Graduation Rate: ≥50% (Btm 50% in ME)
- Overall Testing Rank: Top 10%
- Math Proficiency: 70-79% (Top 10%)
- Reading Proficiency: ≥90% (Top 20%)
- Science Proficiency: 40-59% (Top 30%)
- Source: National Center for Education Statistics (NCES), ME Dept. of Education
Top Rankings
Islesboro Central School ranks among the top 20% of public schools in Maine for:
Category
Attribute
Overall Rank
Math Proficiency
Reading/Language Arts Proficiency
Community Size
Student Attention
School Overview
Islesboro Central School's student population of 64 students has declined by 31% over five school years.
The teacher population of 13 teachers has declined by 13% over five school years.
Grades Offered
Grades Kindergarten-12
(No virtual instruction)
(No virtual instruction)
Total Students
64 students
Total Classroom Teachers
13 teachers
Year Founded
1952
Colors
Royal blue, Silver
School Rankings
Islesboro Central School ranks within the top 10% of all 500 schools in Maine (based off of combined math and reading proficiency testing data).
The diversity score of Islesboro Central School is 0.04, which is less than the diversity score at state average of 0.28. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#43 out of 500 schools
(Top 10%)
(Top 10%)
Math Test Scores (% Proficient)
70-79%
49%
Reading/Language Arts Test Scores (% Proficient)
≥90%
84%
Science Test Scores (% Proficient)
40-59%
37%
Student-Teacher Ratio
5:1
11:1
American Indian
n/a
1%
Asian
n/a
1%
Hispanic
n/a
4%
Black
2%
5%
White
98%
85%
Hawaiian
n/a
n/a
Two or more races
n/a
4%
All Ethnic Groups
Graduation Rate
≥50%
86%
Participates in the National School Lunch Program (NSLP)
Yes
Eligible for Free Lunch
20%
39%
Eligible for Reduced Lunch
9%
7%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), ME Dept. of Education
School Notes
- School Mascot: Islesboro Islander
Frequently Asked Questions
What is Islesboro Central School's ranking?
Islesboro Central School is ranked #43 out of 500 schools, which ranks it among the top 10% of public schools in Maine.
What percent of students have achieved state testing proficiency in math and reading?
70-79% of students have achieved math proficiency (compared to the 49% ME state average), while ≥90% of students have achieved reading proficiency (compared to the 84% ME state average).
What is the graduation rate of Islesboro Central School?
The graduation rate of Islesboro Central School is 50%, which is lower than the Maine state average of 86%.
How many students attend Islesboro Central School?
64 students attend Islesboro Central School.
What is the racial composition of the student body?
98% of Islesboro Central School students are White, and 2% of students are Black.
What is the student-teacher ratio of Islesboro Central School?
Islesboro Central School has a student ration of 5:1, which is lower than the Maine state average of 11:1.
What grades does Islesboro Central School offer ?
Islesboro Central School offers enrollment in grades Kindergarten-12 (No virtual instruction).
What school district is Islesboro Central School part of?
Islesboro Central School is part of Islesboro School District.
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