| Index | Rio Grande City | Texas | National |
| Average Test Scores | 47% | 47% | 48% |
| Student/Teacher ratio | 15:1 | 14:1 | 16:1 |
| Total public schools | 12 | 7,418 | 79,221 |
| Total private schools | 1 | 1,267 | 24,874 |
| Total post-secondary schools | n/a | 463 | 7,963 |
| Index | Rio Grande City | Texas | National |
| Completed 8th grade | 62.5% | 79.3% | 84.3% |
| Completed high school | 60.8% | 77.8% | 83.0% |
| Completed some college | 38.7% | 57.3% | 59.4% |
| Completed associate degree | 21.1% | 34.9% | 38.5% |
| Completed bachelors | 16.8% | 28.1% | 30.3% |
| Completed masters | 5.4% | 9.6% | 11.5% |
| Completed professional degree | 0.5% | 2.6% | 3.3% |
| Completed doctorate | 0.4% | 1.1% | 1.3% |
There are a total of 12 public schools, 1 private schools and n/a post-secondary schools in Rio Grande City. Using the proficiency score averages, the average test scores for Rio Grande City, TX schools is 47%. The average student to teacher ratio is 15:1. In Rio Grande City, TX, an average of 62.5% of students have completed 8th grade and an average of 60.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Roma, TX | 11,427 | 64% | 33.2% |
| Garciasville, TX | 0 | 40% | 17.7% |
| La Grulla, TX | 1,513 | 37% | 24.0% |
| Rio Grande City, TX | 14,411 | 47% | 1.2% |
| City | Population | Avg. Test Scores | National Avg. |
| Morris, IL | 14,420 | 42% | 12.5% |
| Hartselle, AL | 14,421 | 62% | 29.0% |
| Sterling, CO | 14,421 | 40% | 16.3% |
| Glasgow, KY | 14,394 | 53% | 10.1% |
| Robbinsdale, MN | 14,393 | 32% | 34.4% |
| Rio Grande City, TX | 14,411 | 47% | 1.2% |
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