Enrollment
1,832
Maryland · 2024-25 NCES data
High school (grades 9-12) · Millersville, MD
Old Mill High
Federal NCES profile for Old Mill High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 53/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 240006000109
👥 S:T ratio 49
📚 AP courses 100
🌟 Gifted program 70
🎓 Counselors 48
📋 Attendance 0
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Old Mill High earns 53/100 on the Resource Investment Index, with class sizes smaller than 74% of Maryland schools. It is also one of the largest schools in Maryland.
- #5 of 6
- public schools in Millersville · Resource Index
- 53
- Resource Index · Higher
- 12.7:1
- small classes for Maryland
- 42.9%
- free-lunch eligible
Old Mill High has class sizes smaller than 74% of Maryland schools. Computed live against every Maryland school reporting to NCES.
By Resource Investment Index, Old Mill High ranks #5 of 6 public schools in Millersville, MD.
School address
District: Anne Arundel County Public Schools · Maryland
NCES ID 240006000109 Verify on NCES CCD record →
Teachers (FTE)
144.0
Federal CCD staff survey
Students per teacher
12.7:1
vs 14.5:1 Maryland avg
-12% vs state
Free-lunch eligible
42.9%
vs 49.0% Maryland avg
-12% vs state
Student-teacher ratio in context
How Old Mill High compares with Maryland and U.S. medians
What stands out at Old Mill High
Old Mill High is a large high school in Millersville, Maryland, enrolling 1,832 students.
Class sizes run a bit leaner than typical: 12.7:1 puts it in the smaller third of Maryland schools by student-teacher ratio.
Its free-meal eligibility rate of 42.9% lands close to the Maryland typical range, neither a high- nor low-need campus by this measure.
By headcount it is one of the larger campuses in Maryland, bigger than 97% of state schools at 1,832 students.
Its Resource Investment Index sits near the middle of the pack among 1,382 scored Maryland schools.
Against 69 statewide peers matched on enrollment and economic need, it ranks mid-pack at #32.
Its student body is led by African American (36%) and White (27%), more mixed than most schools in the state (diversity index 73/100).
On the academic-pipeline side it reports 21 Advanced Placement courses.
Counselor coverage runs a bit thin, about 262 students per counselor, somewhat past the ASCA-recommended 250:1 benchmark.
Chronic absenteeism is elevated: 46.4% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Anne Arundel County Public Schools also operates Glen Burnie High (2,226 students) and North County High (2,161 students) alongside Old Mill High.
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 Old Mill High compares
Old Mill High on the metrics families compare, against Maryland and U.S. means.
| Metric | This school | vs Maryland | Maryland avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 12.7:1 | ▼ 12% | 14.5:1 | 15.7:1 |
| Free-lunch eligible | 42.9% | ▼ 12% | 49.0% | 51.7% |
| Enrollment | 1,832 | top 3% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
12.7:1
Leaner classes than 69% of US schools, among the more generously staffed nationally.
1,832
Bigger than 98% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
42.9%
free-lunch eligible
- 12% below the Maryland average of 49.0%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
12.7:1
students per teacher
- 12% below state mean
Top 26% in Maryland - lower ratio than 74% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
46.4%
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
$16,620
per pupil, district-wide
- below Maryland avg of $20,446
Close to the U.S. public-school average per-pupil spend.
Support staff
Counselors7.0 FTE
Per 262 students, the combined health-and-guidance staffing load for this school.
Discipline context
8
in-school suspensions + 206 out-of-school
Suspension rate: 0.4 per 100 students. Combined in-school and out-of-school rate: 11.7 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
African American 36.3%
White 26.8%
Hispanic or Latino 25.2%
Two or More 6.5%
Asian 4.5%
American Indian / Alaska Native 0.3%
Native Hawaiian / Pacific Islander 0.3%
Largest group: African American at 36.3% of enrollment.
Student-body diversity index 72.7/100
Simpson diversity index - at 72.7, Old Mill High is more mixed than the Maryland school average of 52.3.
Programs
AP courses offered 21
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Anne Arundel County Public Schools, which includes Old Mill High.
$16,620
Per student
-19%
vs Maryland
Avg $20,446
+0%
vs U.S.
Avg $16,593
Revenue mix
Local 56.4%
State 32.3%
Federal 11.4%
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 Old Mill High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Glen Burnie High | Similar size | Higher economic need | Higher S:T ratio |
| North County High | Similar size | Higher economic need | Higher S:T ratio |
| Broadneck High | Similar size | Lower economic need | Higher S:T ratio |
| Annapolis High | Similar size | Higher economic need | Similar S:T ratio |
| Meade High | Similar size | Similar economic need | Higher S:T ratio |
Comparisons are relative to Old Mill High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 2,226
- Students per teacher
- 16.7:1
- Resource Index
- 47/100
- Enrollment
- 2,161
- Students per teacher
- 15:1
- Resource Index
- 52/100
- Enrollment
- 2,143
- Students per teacher
- 17.6:1
- Resource Index
- 44/100
- Enrollment
- 2,075
- Students per teacher
- 14:1
- Resource Index
- 39/100
- Enrollment
- 2,045
- Students per teacher
- 15.1:1
- Resource Index
- 50/100
Similar high schools statewide
Matched by enrollment size and by staffing ratio across all of Maryland, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~1,832 students)
Next steps
Verify locally before acting on Old Mill High's federal record.
- Compare Old Mill High against another school. Compare schools
- Anne Arundel County 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 Old Mill High
How many students attend Old Mill High?
Old Mill High has 1,832 students enrolled. It is a high school in Millersville, MD.
What is the student-teacher ratio at Old Mill High?
The student-teacher ratio at Old Mill High is 12.7:1, which is 12% lower than the Maryland average of 14.5:1 and 19% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What percentage of students receive free lunch at Old Mill High?
42.9% of students at Old Mill High are eligible for free lunch, compared to the Maryland average of 49.0%.
What is the racial and ethnic makeup of Old Mill High?
The largest demographic group at Old Mill High is African American at 36.3% of enrollment, in Millersville, MD. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 72.7/100.
What is the Resource Investment Index for Old Mill High?
Old Mill High has a Resource Investment Index of 53/100 (higher 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 Old Mill High rank among public schools in Millersville?
By Resource Investment Index, Old Mill High ranks #5 of 6 public schools in Millersville, MD. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in Millersville on the city page.
Is Old Mill High a good school?
Old Mill High earns 53/100 on the Resource Investment Index, with class sizes smaller than 74% of Maryland schools. It is also one of the largest schools in Maryland. 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 Anne Arundel County Public Schools?
Besides Old Mill High, Anne Arundel County Public Schools also operates Glen Burnie High (2,226 students), North County High (2,161 students), and Broadneck High (2,143 students). See the Anne Arundel County 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.