Enrollment
379
Maine · 2024-25 NCES data
High school (grades 9-12) · Portland, ME
Casco Bay High School
Federal NCES profile for Casco Bay High School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 39/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 230993000603
👥 S:T ratio 48
📚 AP courses 30
🌟 Gifted program 30
🎓 Counselors 75
📋 Attendance 15
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Casco Bay High School earns 39/100 on the Resource Investment Index, with class sizes larger than 85% of Maine schools. It is also more racially and ethnically mixed than most Maine schools.
- #1 of 4
- high schools in Portland · Resource Index
- 39
- Resource Index · Typical
- 13.1:1
- large classes for Maine
- 33.0%
- free-lunch eligible
Casco Bay High School has class sizes larger than 85% of Maine schools. Computed live against every Maine school reporting to NCES.
By Resource Investment Index, Casco Bay High School ranks #1 of 4 high schools in Portland, ME.
School address
District: Portland Public Schools · Maine
NCES ID 230993000603 Verify on NCES CCD record →
Teachers (FTE)
29.0
Federal CCD staff survey
Students per teacher
13.1:1
vs 11.1:1 Maine avg
+18% vs state
Free-lunch eligible
33.0%
vs 34.0% Maine avg
-3% vs state
Student-teacher ratio in context
How Casco Bay High School compares with Maine and U.S. medians
What stands out at Casco Bay High School
Casco Bay High School is a mid-sized high school in Portland, Maine, enrolling 379 students.
Class loads run somewhat heavier than typical: 13.1:1 puts it in the larger third of Maine schools by student-teacher ratio.
Its free-meal eligibility rate of 33.0% lands close to the Maine typical range, neither a high- nor low-need campus by this measure.
Enrollment of 379 puts it in the larger third of Maine schools by headcount.
Its Resource Investment Index lands in the lower third of 569 scored Maine schools.
Against 146 statewide peers matched on enrollment and economic need, it ranks mid-pack at #89.
Its student body is led by White (52%) and African American (28%), more mixed than most schools in the state (diversity index 64/100).
On the academic-pipeline side it reports 6 Advanced Placement courses.
Counselor coverage is strong, about 126 students per counselor, inside the American School Counselor Association's recommended 250:1.
Chronic absenteeism is elevated: 34.0% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Among Portland's high schools, it stands alongside Portland High School (912 students): Casco Bay High School is smaller than that campus by headcount and runs leaner classes (13.1:1 vs 13.4:1).
Portland Public Schools also operates Portland High School (912 students) and Deering High School (850 students) alongside Casco Bay High School.
Sourced from NCES CCD, CRDC, and F-33 (federal records, not a quality verdict). How we source and compute this.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Casco Bay High School compares
Casco Bay High School on the metrics families compare, against Maine and U.S. means.
| Metric | This school | vs Maine | Maine avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 13.1:1 | ▲ 18% | 11.1:1 | 15.7:1 |
| Free-lunch eligible | 33.0% | ▼ 3% | 34.0% | 51.7% |
| Enrollment | 379 | top 26% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
13.1:1
Leaner classes than 66% of US schools, among the more generously staffed nationally.
379
Bigger than 44% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
33.0%
free-lunch eligible
- 3% below the Maine average of 34.0%
Below the 40% Title I threshold; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
13.1:1
students per teacher
- 18% above state mean
Top 85% in Maine - lower ratio than 15% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
34.0%
chronically absent (missed 10%+ of school days)
At or above 20%, the commonly used threshold for "high" chronic absenteeism, signaling significant barriers to regular attendance.
Funding equity
$20,442
per pupil, district-wide
- above Maine avg of $20,083
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors3.0 FTE
Per 126 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 29 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 7.7 per 100 students. Reported via the Civil Rights Data Collection.
Overview
- Common Core of Data (June 2026): enrollment, staffing, and the student-teacher ratio above.
- Civil Rights Data Collection: discipline counts and program access (AP, gifted, special education).
- F-33 School District Finance Survey: the district-wide per-pupil spending figures below.
Three separate federal collections, each on its own reporting cadence - which is why this school's numbers line up on a consistent basis against every other school and state on this site, rather than mixing figures pulled from different survey years.
Student demographics
White 51.6%
African American 28.3%
Hispanic or Latino 8.2%
Asian 6.3%
Two or More 4.8%
American Indian / Alaska Native 0.5%
Native Hawaiian / Pacific Islander 0.3%
Largest group: White at 51.6% of enrollment.
Student-body diversity index 64.1/100
Simpson diversity index - at 64.1, Casco Bay High School is more mixed than the Maine school average of 20.6.
Programs
AP courses offered 6
Funding & spending
District-wide per-pupil expenditure for Portland Public Schools, which includes Casco Bay High School.
$20,442
Per student
+2%
vs Maine
Avg $20,083
+23%
vs U.S.
Avg $16,593
Revenue mix
Local 68.1%
State 23.3%
Federal 8.7%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2021-22 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
How Casco Bay High School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Portland High School | Larger | Similar economic need | Similar S:T ratio |
| Deering High School | Larger | Higher economic need | Similar S:T ratio |
| Harrison Lyseth Elem School | Larger | Similar economic need | Similar S:T ratio |
| Amanda C Rowe School | Similar size | Similar economic need | Similar S:T ratio |
| Lyman Moore Middle School | Similar size | Similar economic need | Lower S:T ratio |
Comparisons are relative to Casco Bay High School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 912
- Students per teacher
- 13.4:1
- Resource Index
- 34/100
- Enrollment
- 850
- Students per teacher
- 14.2:1
- Resource Index
- 35/100
- Enrollment
- 489
- Students per teacher
- 11.9:1
- Resource Index
- 65/100
- Enrollment
- 470
- Students per teacher
- 11.8:1
- Resource Index
- 59/100
- Enrollment
- 470
- Students per teacher
- 9.2:1
- Resource Index
- 47/100
Similar high schools in Portland
3 comparable high schools (grades 9-12) serving the same city.
Similar high schools statewide
Matched by enrollment size and by staffing ratio across all of Maine, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~379 students)
Similar student-teacher ratio (~13.1:1)
Next steps
Verify locally before acting on Casco Bay High School's federal record.
- Compare Casco Bay High School against another school. Compare schools
- Portland Public Schools's spending and staffing shape this school. District profile
- Confirm current enrollment and boundaries with the school. Choosing guide
Federal record (CCD 2024-25, CRDC 2021-22) - PlainSchools assigns no subjective rating; the composite quality score is a transparent, reproducible index computed from this cited federal data.
Frequently asked questions about Casco Bay High School
How many students attend Casco Bay High School?
Casco Bay High School has 379 students enrolled. It is a high school in Portland, ME.
What is the student-teacher ratio at Casco Bay High School?
The student-teacher ratio at Casco Bay High School is 13.1:1, which is 18% higher than the Maine average of 11.1:1 and 17% lower than the national average of 15.7:1.
What percentage of students receive free lunch at Casco Bay High School?
33.0% of students at Casco Bay High School are eligible for free lunch, compared to the Maine average of 34.0%.
What is the racial and ethnic makeup of Casco Bay High School?
The largest demographic group at Casco Bay High School is White at 51.6% of enrollment, in Portland, ME. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 64.1/100.
What is the Resource Investment Index for Casco Bay High School?
Casco Bay High School has a Resource Investment Index of 39/100 (typical reported resources relative to schools nationally) based on 5 factors: student-teacher ratio, AP course offerings, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Casco Bay High School rank among high schools in Portland?
By Resource Investment Index, Casco Bay High School ranks #1 of 4 high schools in Portland, ME. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all high schools in Portland on the city page.
Is Casco Bay High School a good school?
Casco Bay High School earns 39/100 on the Resource Investment Index, with class sizes larger than 85% of Maine schools. It is also more racially and ethnically mixed than most Maine schools. This is a resource snapshot, not an academic rating; see the Resource Investment Index question above for what the number does and doesn't measure.
What other schools are in Portland Public Schools?
Besides Casco Bay High School, Portland Public Schools also operates Portland High School (912 students), Deering High School (850 students), and Harrison Lyseth Elem School (489 students). See the Portland Public Schools district page for the complete list.
Related tools
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. Each school's figures reflect its most recent NCES/CRDC submission on file. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.