Total enrollment
2,262
-78 (-3%) vs SY 2020-21
6 schools in RSU 21
Maine · 2,262 students · 3 cities
RSU 21, Maine operates 6 public K-12 schools between its neighborhoods, enrolling about 2,262 students (around 377 per school).
4-year change in RSU 21
SY 2020-21 vs SY 2024-25School count
6
0 (0%) vs SY 2020-21
Source: NCES Common Core of Data, enrollment-weighted demographic averages
How RSU 21 ranks
Among districts| Measure | This district | In Maine | In the US |
|---|---|---|---|
| Enrollment ranked largest first | 2,262 | #20 of 85 | #4,048 of 9,234 |
| Number of schools ranked most first | 6 | #26 of 85 | N/A |
| Students per teacher ranked fewest first | 11.2:1 | #32 of 85 | #1,250 of 9,044 |
| Free or reduced-price lunch share ranked highest first | 17.1% | #81 of 85 | #7,620 of 8,164 |
| Diversity index ranked most diverse first | 18.0% | #32 of 59 | #5,893 of 6,853 |
Districts need at least 2 schools and 500 students to be ranked. Test proficiency is ranked within the state only, since each state gives a different test. Each rank links to the full list.
Inside RSU 21
Since 2017-18, the 6 district schools that reported both years went from 2,346 to 2,262 students (down 4%) and from 187 to 202 full-time teachers (up 8%), as of 2024-25.
Proficient is the average share of students meeting the state standard across each school's state tests in 2023-24 and 2024-25; schools with fewer than 100 students and schools serving specialized populations are left out. Staffing figures come from the NCES Common Core of Data and count only schools that reported students and teachers in both years.
| Name | City | Level | Grades | Enrollment |
|---|---|---|---|---|
| Kennebunk High School | Kennebunk | High | 09-12 | 683 |
| Middle School of the Kennebunks | Kennebunk | Middle | 06-08 | 470 |
| Kennebunk Elementary School | Kennebunk | Elementary | PK-02 | 378 |
| Sea Road School | Kennebunk | Elementary | 03-05 | 308 |
| Mildred L Day School | Arundel | Elementary | KG-05 | 224 |
| Kennebunkport Consolidated Sch | Kennebunkport | Elementary | KG-05 | 199 |
About RSU 21
RSU 21 administers 6 public schools across Maine, collectively hosting roughly 2,262 students.
For a sense of the school types, RSU 21 is built around 4 elementary, 1 middle, and 1 high school.
Average enrollment per school in RSU 21 is about 377, above the Maine average of roughly 293.
Trend over the past 4 years. Total public-school enrollment in RSU 21 has contracted 3% since SY 2020-21, moving from about 2,340 students to 2,262.
On this page, the community for RSU 21 discusses comparison threads between local schools and program reviews. Anyone with firsthand knowledge of these schools is welcome to weigh in.