South Mountain School vs Washington School
A head-to-head comparison of two schools in New Jersey, United States, 1000 m apart, using official American 2025 data. The better value in each row is highlighted.
South Mountain School
Millburn · Public elementary · Grades PK–4
278 students
Washington School
Millburn · Public middle · Grades 5–5
363 students
| Measure | South Mountain School Millburn, New Jersey | Washington School Millburn, New Jersey |
|---|---|---|
| Success Index (US) | 95 Top 5% | 98 Top 5% |
| State rank | #20 of 1,479 | #5 of 440 |
| National rank | #73 of 50,301 | #7 of 15,369 |
| Sector | Public | Public |
| Type | Elementary | Middle |
| Year range | Grades PK–4 | Grades 5–5 |
| Students | 278 | 363 |
| Enrollment | 278 | 363 |
| Free/reduced-price lunch | 2.9% | 2.2% |
| Students per teacher | 9.9 | 10.7 |
| Reading proficiency | 82% | 92% |
| Math proficiency | 82% | 87% |
| city | Millburn | Millburn |
| state | New Jersey | New Jersey |
| Website | – | – |
The verdict
- •Washington School scores higher on the Success Index (US) (97.5 vs 95.4).
- •Washington School does better on math proficiency (87% vs 82%).
- •Washington School does better on reading proficiency (92% vs 82%).
- •Washington School does better on community advantage (fewer free/reduced-price lunch) (2.2% vs 2.9%).
- •South Mountain School does better on students per teacher (9.9 vs 10.7).
- •Washington School is the larger school with 363 students compared with 278.
The Success Index (US) summarises published results and context from official data. It does not measure teaching quality or fit. Methodology.
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Frequently asked questions
Is South Mountain School better than Washington School?
On the Success Index (US), Washington School ranks higher (97.5 vs 95.4 out of 100). The index is built from published results and context data, not from teaching quality or fit, so visit both schools before deciding.
How far apart are South Mountain School and Washington School?
About 1000 m in a straight line, between Millburn and Millburn in New Jersey.
Which has the better Enrollment?
South Mountain School: 278. Washington School: 363. Students enrolled in the latest NCES directory year.
How do South Mountain School and Washington School rank in New Jersey?
South Mountain School is 20th of 1,479 and Washington School is 5th of 440 among elementary schools in New Jersey on the 2025 Success Index (US).