Cardiff Elementary vs JCS - Mountain Oaks
A head-to-head comparison of two elementary schools in California, United States, 2.3 km apart, using official American 2025 data. The better value in each row is highlighted.
Cardiff Elementary
Cardiff-by-the-Sea · Public elementary · Grades K–2
259 students
JCS - Mountain Oaks
Encinitas · Charter elementary · Grades K–8
255 students
| Measure | Cardiff Elementary Cardiff-by-the-Sea, California | JCS - Mountain Oaks Encinitas, California |
|---|---|---|
| Success Index (US) | 78 Top 25% | 78 Top 25% |
| State rank | #376 of 5,693 | #396 of 5,693 |
| National rank | #6068 of 50,301 | #6250 of 50,301 |
| Sector | Public | Charter |
| Type | Elementary | Elementary |
| Year range | Grades K–2 | Grades K–8 |
| Students | 259 | 255 |
| Enrollment | 259 | 255 |
| Free/reduced-price lunch | 11.2% | 25.9% |
| Students per teacher | 21.6 | 17.0 |
| Reading proficiency | 64.5% | 75% |
| Math proficiency | 84.5% | 70% |
| city | Cardiff-by-the-Sea | Encinitas |
| state | California | California |
| Website | – | – |
The verdict
- •Both schools have almost identical Success Index (US) scores (78.1 vs 77.8).
- •Cardiff Elementary does better on math proficiency (84.5% vs 70%).
- •JCS - Mountain Oaks does better on reading proficiency (75% vs 64.5%).
- •Cardiff Elementary does better on community advantage (fewer free/reduced-price lunch) (11.2% vs 25.9%).
- •JCS - Mountain Oaks does better on students per teacher (17.0 vs 21.6).
- •Cardiff Elementary is the larger school with 259 students compared with 255.
- •Cardiff Elementary is a public school while JCS - Mountain Oaks is a charter school, so fees and admission rules differ.
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 Cardiff Elementary better than JCS - Mountain Oaks?
The two schools are very close on the Success Index (US). Differences in sector, size, programmes and distance from home will matter more than the score.
How far apart are Cardiff Elementary and JCS - Mountain Oaks?
About 2.3 km in a straight line, between Cardiff-by-the-Sea and Encinitas in California.
Which has the better Enrollment?
Cardiff Elementary: 259. JCS - Mountain Oaks: 255. Students enrolled in the latest NCES directory year.
How do Cardiff Elementary and JCS - Mountain Oaks rank in California?
Cardiff Elementary is 376th of 5,693 and JCS - Mountain Oaks is 396th of 5,693 among elementary schools in California on the 2025 Success Index (US).