Enrollment
141
New Jersey · 2024-25 NCES data
Elementary school (grades K-5) · Hamilton, NJ
Mercer Elementary School
Federal NCES profile for Mercer Elementary School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 67/100.
2024-25 NCES dataElementary school (grades K-5)NCES 348020006119
👥 S:T ratio 78
🌟 Gifted program 30
🎓 Counselors 93
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Mercer Elementary School earns 67/100 on the Resource Investment Index, with class sizes smaller than 98% of New Jersey schools.
- #1 of 3
- public schools in Hamilton · Resource Index
- 67
- Resource Index · Higher
- 5.6:1
- small classes for New Jersey
- 46.6%
- free-lunch eligible
Mercer Elementary School has class sizes smaller than 98% of New Jersey schools. Computed live against every New Jersey school reporting to NCES.
By Resource Investment Index, Mercer Elementary School ranks #1 of 3 public schools in Hamilton, NJ.
School address
NCES ID 348020006119 Verify on NCES CCD record →
Teachers (FTE)
25.0
Federal CCD staff survey
Students per teacher
5.6:1
vs 11.8:1 New Jersey avg
-53% vs state
Free-lunch eligible
46.6%
vs 29.6% New Jersey avg
+57% vs state
Student-teacher ratio in context
How Mercer Elementary School compares with New Jersey and U.S. medians
What stands out at Mercer Elementary School
Mercer Elementary School is a small elementary school in Hamilton, New Jersey, enrolling 141 students.
Classes run notably small here: at 5.6:1, Mercer Elementary School is leaner than roughly 98% of New Jersey schools and 53% under the state's 11.8:1 norm, more adult attention per pupil than most peers.
Economic need runs somewhat above the state's typical profile, with 46.6% of students eligible for free meals.
This is a small campus: fewer students than 93% of New Jersey schools, with 141 enrolled.
Its Resource Investment Index outscores 91% of the 2,501 New Jersey schools with a score on record, a top-tier result on this measure.
Among 43 similarly sized, similarly resourced-need New Jersey schools statewide, it ranks #2, a top-tier result once campus size and economic need are matched.
Its student body is led by African American (44%) and Hispanic or Latino (29%) (diversity index 69/100).
Counselor coverage is strong, about 35 students per counselor, inside the American School Counselor Association's recommended 250:1.
Mercer County Special Services School District also operates Mercer High School (200 students) and Joseph F. Cappello School (97 students) alongside Mercer Elementary 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 Mercer Elementary School compares
Mercer Elementary School on the metrics families compare, against New Jersey and U.S. means.
| Metric | This school | vs New Jersey | New Jersey avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 5.6:1 | ▼ 53% | 11.8:1 | 15.7:1 |
| Free-lunch eligible | 46.6% | ▲ 57% | 29.6% | 51.7% |
| Enrollment | 141 | top 93% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
5.6:1
Leaner classes than 98% of US schools, among the more generously staffed nationally.
141
Bigger than 14% of US schools by enrollment, a small campus.
Equity indicators (what these measure)
Economic need
46.6%
free-lunch eligible
- 57% above the New Jersey average of 29.6%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
5.6:1
students per teacher
- 53% below state mean
Top 2% in New Jersey - lower ratio than 98% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Support staff
Counselors4.0 FTE
Per 35 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 2 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 1.4 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 44.0%
Hispanic or Latino 29.1%
White 14.9%
Asian 9.2%
Two or More 2.8%
Largest group: African American at 44.0% of enrollment.
Student-body diversity index 69.0/100
Simpson diversity index - at 69.0, Mercer Elementary School is more mixed than the New Jersey school average of 51.2.
Programs
How Mercer Elementary School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Mercer High School | Larger | Similar economic need | Similar S:T ratio |
| Joseph F. Cappello School | Smaller | Lower economic need | Similar S:T ratio |
| Regional Day School | Smaller | No free-lunch data | No ratio data |
Comparisons are relative to Mercer Elementary School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 200
- Students per teacher
- 5.9:1
- Resource Index
- 67/100
- Enrollment
- 97
- Students per teacher
- 6.1:1
- Resource Index
- 65/100
- Enrollment
- 1
- Students per teacher
- -
Similar elementary schools statewide
Matched by enrollment size and by staffing ratio across all of New Jersey, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~141 students)
Similar student-teacher ratio (~5.6:1)
Next steps
Verify locally before acting on Mercer Elementary School's federal record.
- Compare Mercer Elementary School against another school. Compare schools
- Mercer County Special Services School District'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 Mercer Elementary School
How many students attend Mercer Elementary School?
Mercer Elementary School has 141 students enrolled. It is an elementary school in Hamilton, NJ.
What is the student-teacher ratio at Mercer Elementary School?
The student-teacher ratio at Mercer Elementary School is 5.6:1, which is 53% lower than the New Jersey average of 11.8:1 and 64% 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 Mercer Elementary School?
46.6% of students at Mercer Elementary School are eligible for free lunch, compared to the New Jersey average of 29.6%.
What is the racial and ethnic makeup of Mercer Elementary School?
The largest demographic group at Mercer Elementary School is African American at 44.0% of enrollment, in Hamilton, NJ. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 69.0/100.
What is the Resource Investment Index for Mercer Elementary School?
Mercer Elementary School has a Resource Investment Index of 67/100 (higher reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, counselor availability. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Mercer Elementary School rank among public schools in Hamilton?
By Resource Investment Index, Mercer Elementary School ranks #1 of 3 public schools in Hamilton, NJ. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in Hamilton on the city page.
Is Mercer Elementary School a good school?
Mercer Elementary School earns 67/100 on the Resource Investment Index, with class sizes smaller than 98% of New Jersey 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 Mercer County Special Services School District?
Besides Mercer Elementary School, Mercer County Special Services School District also operates Mercer High School (200 students), Joseph F. Cappello School (97 students), and Regional Day School (1 students). See the Mercer County Special Services School District district page for the complete list.
Related tools
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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.