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Rsu 21 Schools
Rsu 21 is a public school district in Maine, based in York County (Kennebunk). SchoolGrade grades 6 of its schools on actual versus projected test scores; every school below has its own page.
Rsu 21 on the map
District boundary from the NCES EDGE composite school district file. Each marker is a graded school; click it for its grade and scores.
SchoolGrade summary for Rsu 21
5 of 6 schools in Rsu 21 carry a SchoolGrade (1 have too little test data to grade). Grade distribution:
A: 5
Best schools in Rsu 21
Statewide rankings: all 111 high schools in Maine · all 76 middle schools in Maine · all 292 elementary schools in Maine
The ten highest SchoolGrades in the district. Grades reward actual test performance against the projection for each school's student context, so a B in a high-poverty school can outrank an A- elsewhere on impact.
- A+ Kennebunk High School (High school, greatly exceeds expectations)
- A+ Middle School Of The Kennebunks (Middle school, greatly exceeds expectations)
- A+ Mildred L Day School (Elementary school, exceeds expectations)
- A+ Sea Road School (Elementary school, greatly exceeds expectations)
- A+ Kennebunkport Consolidated Sch (Elementary school, greatly exceeds expectations)
Every school in Rsu 21
All schools, A to Z (6)
- Kennebunk Elementary School, Kennebunk
- A+ Kennebunk High School, Kennebunk
- A+ Kennebunkport Consolidated Sch, Kennebunkport
- A+ Middle School Of The Kennebunks, Kennebunk
- A+ Mildred L Day School, Arundel
- A+ Sea Road School, Kennebunk
Where Rsu 21 schools are
Cities and towns served (2)
- Kennebunk (4)
- Kennebunkport (1)
About this district
- State: Best schools in Maine
- County: York County
- Type: regular local school district
- Setting: small suburb (NCES locale of the district office)
- Enrollment: 2,401 students with 202 full-time-equivalent teachers and 515 total staff FTE (NCES CCD, 2023-24)
- NCES district ID: 2314773
- Grades are the 2025-26 SchoolGrade model: each school's actual proficiency against the level projected for its student context. How SchoolGrade works
Nearby school districts
- Biddeford Public Schools (5 schools, 6 mi)
- Wells-Ogunquit CSD (3 schools, 8 mi)
- Saco Public Schools (5 schools, 11 mi)
- Rsu 23 (3 schools, 12 mi)
- Sanford Public Schools (5 schools, 13 mi)
- Scarborough Public Schools (6 schools, 15 mi)
- York Public Schools (4 schools, 16 mi)
- Rsu 35/msad 35 (5 schools, 18 mi)
Questions about Rsu 21
How many schools are in Rsu 21?
SchoolGrade grades 6 public schools in Rsu 21, across 2 cities and towns. Every one of them is listed on this page with a link to its own report.
Which cities does Rsu 21 serve?
The largest by graded schools: Kennebunk, Kennebunkport.
How good are the schools in Rsu 21?
Across the 5 graded schools, the average SchoolGrade is A+, with 91.6% of tested students meeting the state bar against a projected 78.6%. 100% of schools meet or exceed the expectation for their student context.
How many students attend Rsu 21?
2,401 students were enrolled in Rsu 21 in the 2023-24 school year, about 11.9 students per full-time teacher (NCES Common Core of Data).
Where is Rsu 21?
Rsu 21 is in Maine, based in York County, with its district office in Kennebunk. Its boundary covers about 79.5 sq mi.