Top Rankings
RSU 21 School District ranks among the top 20% of public school district in Maine for:
Category
Attribute
Overall Rank
Highest overall rank (Top 10%)
Math Proficiency
Highest math proficiency (Top 10%)
Reading/Language Arts Proficiency
Highest reading/language arts proficiency (Top 10%)
Graduation Rate
Highest graduation rate (Top 5%)
Community Size
Largest student body (number of students) (Top 1%)
For the 2026-27 school year, there are 6 public schools serving 2,262 students in RSU 21 School District. This district's average testing ranking is 9/10, which is in the top 20% of public schools in Maine.
Public Schools in RSU 21 School District have an average math proficiency score of 70% (versus the Maine public school average of 49%), and reading proficiency score of 92% (versus the 84% statewide average).
Minority enrollment is 9% of the student body (majority Hispanic), which is less than the Maine public school average of 15% (majority Black and Hispanic).
Overview
This School District
This State (ME)
# Schools
6 Schools
593 Schools
# Students
2,262 Students
166,401 Students
# Teachers
202 Teachers
15,177 Teachers
Student-Teacher Ratio
11:1
11:1
Student By Grade
District Rank
RSU 21 School District, which is ranked within the top 20% of all 182 school districts in Maine (based off of combined math and reading proficiency testing data) for the 2022-2023 school year.
The school district's graduation rate of 92% has decreased from 95% over five school years.
Overall District Rank
#11 out of 189 school districts
(Top 10%)
(Top 10%)
Showing 2013–2023. Full 14-year historical data available below ↓
Math Test Scores (% Proficient)
70%
49%
Showing 2013–2023. Full 14-year historical data available below ↓
Reading/Language Arts Test Scores (% Proficient)
92%
84%
Showing 2012–2022. Full 13-year historical data available below ↓
Science Test Scores (% Proficient)
49%
37%
Graduation Rate
92%
87.3%
Showing 2014–2023. Full 13-year historical data available below ↓
Chronically Absent Students
(2022-23)26.5%
28.5%
Students by Ethnicity:
Diversity Score
0.18
0.28
Showing 2014–2023. Full 14-year historical data available below ↓
% American Indian
n/a
1%
% Asian
2%
1%
Showing 2014–2023. Full 14-year historical data available below ↓
% Hispanic
4%
4%
Showing 2014–2023. Full 12-year historical data available below ↓
% Black
1%
5%
Showing 2014–2023. Full 14-year historical data available below ↓
% White
91%
85%
Showing 2014–2023. Full 14-year historical data available below ↓
% Hawaiian
n/a
n/a
% Two or more races
2%
4%
Showing 2014–2023. Full 13-year historical data available below ↓
All Ethnic Groups
District Revenue and Spending
The revenue/student of $25,858 is higher than the state median of $22,146. The school district revenue/student has stayed relatively flat over four school years.
The school district's spending/student of $26,947 is higher than the state median of $22,012. The school district spending/student has grown by 20% over four school years.
Total Revenue
$59 MM
$3,685 MM
Showing 2014–2023. Full 14-year historical data available below ↓
Spending
$61 MM
$3,663 MM
Showing 2014–2023. Full 14-year historical data available below ↓
Revenue / Student
$25,858
$22,146
Spending / Student
$26,947
$22,012
Best RSU 21 School District Public Schools (2026-27)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Sea Road School
(Math: 79% | Reading: 93%)
Rank:
Rank:
10/
Top 5%10
29 Sea Road
Kennebunk, ME 04043
(207) 985-1105
Kennebunk, ME 04043
(207) 985-1105
Gr: 3-5 | 308 students Student-teacher ratio: 13:1 Minority enrollment: 13%
Rank: #22.
Mildred L Day School
(Math: 75-79% | Reading: 90-94%)
Rank:
Rank:
10/
Top 5%10
600 Limerick Road
Kennebunkport, ME 04046
(207) 284-4677
Kennebunkport, ME 04046
(207) 284-4677
Gr: K-5 | 224 students Student-teacher ratio: 11:1 Minority enrollment: 12%
Rank: #33.
Kennebunk Elementary School
(Math: 70-74% | Reading: 70-74% )
Rank:
Rank:
10/
Top 5%10
177 Alewive Road
Kennebunk, ME 04043
(207) 985-4402
Kennebunk, ME 04043
(207) 985-4402
Gr: PK-2 | 378 students Student-teacher ratio: 12:1 Minority enrollment: 9%
Rank: #44.
Middle School Of The Kennebunks
(Math: 69% | Reading: 95%)
Rank:
Rank:
10/
Top 10%10
60 Thompson Road
Kennebunk, ME 04043
(207) 467-8004
Kennebunk, ME 04043
(207) 467-8004
Gr: 6-8 | 470 students Student-teacher ratio: 10:1 Minority enrollment: 8%
Rank: #55.
Kennebunkport Consolidated School
(Math: 70-74% | Reading: 85-89%)
Rank:
Rank:
9/
Top 20%10
25 School Street
Kennebunkport, ME 04046
(207) 967-2121
Kennebunkport, ME 04046
(207) 967-2121
Gr: K-5 | 199 students Student-teacher ratio: 10:1 Minority enrollment: 9%
Rank: #66.
Kennebunk High School
(Math: 50-54% | Reading: 80-84%)
Rank:
Rank:
6/
Top 50%10
89 Fletcher Street
Kennebunk, ME 04043
(207) 985-1110
Kennebunk, ME 04043
(207) 985-1110
Gr: 9-12 | 683 students Student-teacher ratio: 12:1 Minority enrollment: 8%
Frequently Asked Questions
How many schools belong to RSU 21 School District?
RSU 21 School District manages 6 public schools serving 2,262 students.
What is the rank of RSU 21 School District?
RSU 21 School District is ranked #22 out of 182 school districts in Maine (top 20%) based off of combined math and reading proficiency testing data for the 2022-2023 school year. This district ranks in the top 20% of Maine school districts for: Highest overall rank (Top 10%), Highest math proficiency (Top 10%), Highest reading/language arts proficiency (Top 10%), Highest graduation rate (Top 5%) and Largest student body (number of students) (Top 1%)
What is the racial composition of students in RSU 21 School District?
91% of RSU 21 School District students are White, 4% of students are Hispanic, 2% of students are Asian, 2% of students are Two or more races, and 1% of students are Black.
What is the student/teacher ratio of RSU 21 School District?
RSU 21 School District has a student/teacher ratio of 11:1, which is equal to the Maine state average of 11:1.
What is RSU 21 School District's spending/student ratio?
The school district's spending/student of $26,947 is higher than the state median of $22,012. The school district spending/student has grown by 20% over four school years.
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