Every figure on PlainSchools is rendered directly from the source NCES, CRDC and F-33 federal
records, no number is typed in by an editor. District totals are aggregated directly from the schools reporting under this district in the source records. See our
editorial standards & corrections policy, the
methodology behind these numbers, or
report a data error. Data current as of June 2026.
Kennebunk, Maine - 6 schools
An equity score of 41/100 ranks Rsu 21 #90 of 131 districts in Maine (state average 50). Derived live from how evenly resources are distributed across the district's schools.
At $18,898 per pupil, Rsu 21 ranks #87 of 203 Maine districts by per-pupil spending (Maine districts). NCES F-33 finance data.
2,425
Total Enrollment
6
Schools
$18,898
Per-Pupil Spending
Elementary, High
School Types
District-Level NCES Analysis
Rsu 21 operates 6 public schools serving 2,425 students, placing it among the smallest districts in Maine. The school portfolio breaks down into 3 elementary, 1 high, 1 middle, 1 combined schools, a small enough portfolio that most families will interact with nearly every campus in the district at some point. These enrollment and school figures come from the NCES Common Core of Data (CCD) 2024-25 release, and the district is based in York County.
Per-pupil expenditure runs $18,898 according to the NCES F-33 School District Finance Survey, in the upper half of 203 Maine districts by per-pupil spending. See how Maine compares in our national per-pupil spending analysis. The funding mix is 78.3% local, 18.5% state, and 3.2% federal, a local-revenue-heavy mix that leaves the district more exposed to property-tax swings and local ballot measures than state-funded peers. The district's equity score is 41/100, ranked #90 of 131 in Maine against a state average of 50, notably less even than the typical district in the state for how evenly funding reaches its schools.
Academic infrastructure includes 1 of 6 schools offering Advanced Placement (12 AP courses district-wide), a 242.2:1 student-counselor ratio, that meets the ASCA-recommended benchmark, and 27.8% chronic absenteeism from the 2021-22 Civil Rights Data Collection. Demographically, the student body averages 90.1% White, 4.0% Hispanic or Latino, 1.9% Asian across the district's schools. Its most demographically mixed campus is Sea Road School, with a diversity index of 23.6/100.
Its largest campus is Kennebunk High School, enrolling 683 students (30% of the district's total enrollment). Its smallest is Kennebunkport Consolidated Sch, at 199 students, a 3x enrollment spread across the district's campuses.
Kennebunk High School accounts for 28.2% of all Rsu 21 student enrollment
That dominant concentration means Rsu 21-wide averages can mask substantial variation outside the dominant entity. Grade band: high. A single dominant campus often anchors a district's program offerings and staffing patterns; the share helps explain why district-wide averages may not reflect the typical neighbourhood-school experience. When one entity dominates a region's footprint, its programmatic and budget decisions effectively set policy for a majority of the affected population.
Rsu 21 school enrollment varies 3.4× across entities
Rsu 21 school enrollment ranges from 199 students (lowest) to 683 students (highest), a spread of 484 students. That relatively narrow ratio reflects an unusually homogeneous campus portfolio, most districts have a wider mix of school sizes. Per-school staffing ratios, programme availability, and capital-renovation cycles often diverge inside the same district based on enrollment shape.
Rsu 21 student-counselor ratio is 242:1 — low (typically associated with meeting or exceeding the American School Counselor Association (ASCA) recommended 250:1 benchmark, which correlates with stronger college and career counseling capacity)
student-counselor ratio is the simplest comparative metric but it does not capture the full picture: the ratio counts FTE counselors against total enrollment, districts that contract intervention or social-emotional staff outside the counselor classification may be under-counted Lower values often correlate with smaller scale and population characteristics rather than higher resource budgets per se.
Rsu 21 chronic absenteeism rate is 27.8% — near the typical range (US average ~28) — aligned with the national post-pandemic baseline of roughly 28% chronic absenteeism
chronic absenteeism rate is the simplest comparative metric but it does not capture the full picture: a student is chronically absent if they miss ≥10% of enrolled days for any reason, illness, family obligations, or disengagement Variation between sub-units within Rsu 21 is typically wider than the Rsu 21-aggregate figure suggests.