| Index | Sinton | Texas | National |
| Average Test Scores | 46% | 47% | 48% |
| Student/Teacher ratio | 13:1 | 14:1 | 16:1 |
| Total public schools | 8 | 7,418 | 79,221 |
| Total private schools | n/a | 1,267 | 24,874 |
| Total post-secondary schools | n/a | 463 | 7,963 |
| Index | Sinton | Texas | National |
| Completed 8th grade | 67.9% | 79.3% | 84.3% |
| Completed high school | 66.0% | 77.8% | 83.0% |
| Completed some college | 45.0% | 57.3% | 59.4% |
| Completed associate degree | 16.5% | 34.9% | 38.5% |
| Completed bachelors | 11.6% | 28.1% | 30.3% |
| Completed masters | 4.9% | 9.6% | 11.5% |
| Completed professional degree | 1.3% | 2.6% | 3.3% |
| Completed doctorate | 0.7% | 1.1% | 1.3% |
There are a total of 8 public schools, n/a private schools and n/a post-secondary schools in Sinton. Using the proficiency score averages, the average test scores for Sinton, TX schools is 46%. The average student to teacher ratio is 13:1. In Sinton, TX, an average of 67.9% of students have completed 8th grade and an average of 66.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Portland, TX | 17,807 | 53% | 11.0% |
| Odem, TX | 2,205 | 48% | 0.7% |
| Gregory, TX | 2,218 | 43% | 11.5% |
| Woodsboro, TX | 1,441 | 40% | 17.7% |
| Taft, TX | 2,924 | 24% | 50.3% |
| Sinton, TX | 5,389 | 46% | 4.2% |
| City | Population | Avg. Test Scores | National Avg. |
| Fruitland, ID | 5,390 | 49% | 1.8% |
| Pinckneyville, IL | 5,391 | 36% | 25.3% |
| Chester, SC | 5,392 | 29% | 38.9% |
| Frankenmuth, MI | 5,396 | 69% | 42.7% |
| Chelsea, MI | 5,378 | 65% | 36.1% |
| Sinton, TX | 5,389 | 46% | 4.2% |
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