| Index | El Rio | California | National |
| Average Test Scores | n/a | 43% | 48% |
| Student/Teacher ratio | n/a | 20:1 | 16:1 |
| Total public schools | n/a | 8,308 | 79,221 |
| Total private schools | n/a | 3,438 | 24,874 |
| Total post-secondary schools | n/a | 1,085 | 7,963 |
| Index | El Rio | California | National |
| Completed 8th grade | 61.0% | 81.1% | 84.3% |
| Completed high school | 59.3% | 79.8% | 83.0% |
| Completed some college | 34.5% | 61.5% | 59.4% |
| Completed associate degree | 14.6% | 39.8% | 38.5% |
| Completed bachelors | 8.4% | 32.0% | 30.3% |
| Completed masters | 1.0% | 11.9% | 11.5% |
| Completed professional degree | 0.3% | 3.9% | 3.3% |
| Completed doctorate | 0.0% | 1.6% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in El Rio. Using the proficiency score averages, the average test scores for El Rio, CA schools is n/a. The average student to teacher ratio is n/a. In El Rio, CA, an average of 61.0% of students have completed 8th grade and an average of 59.3% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| San Buenaventura (Ventura), CA | 108,467 | 49% | 3.1% |
| Oak View, CA | 6,557 | 48% | = 100 |
| Camarillo, CA | 68,583 | 45% | 6.4% |
| Casa Conejo, CA | 3,184 | 42% | 12.5% |
| Santa Paula, CA | 30,297 | 37% | 22.0% |
| El Rio, CA | 6,506 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Garrett, IN | 6,507 | 43% | 10.8% |
| Winsted, CT | 6,504 | 55% | 15.0% |
| Oakmont, PA | 6,504 | 77% | 60.4% |
| Purcell, OK | 6,508 | 33% | 30.6% |
| Estes Park, CO | 6,504 | 36% | 24.7% |
| El Rio, CA | 6,506 | n/a |
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