| Index | Harlingen | Texas | National |
| Average Test Scores | 48% | 47% | 48% |
| Student/Teacher ratio | 16:1 | 14:1 | 16:1 |
| Total public schools | 29 | 7,418 | 79,221 |
| Total private schools | 6 | 1,267 | 24,874 |
| Total post-secondary schools | 3 | 463 | 7,963 |
| Index | Harlingen | Texas | National |
| Completed 8th grade | 71.7% | 79.3% | 84.3% |
| Completed high school | 69.5% | 77.8% | 83.0% |
| Completed some college | 45.8% | 57.3% | 59.4% |
| Completed associate degree | 26.0% | 34.9% | 38.5% |
| Completed bachelors | 17.6% | 28.1% | 30.3% |
| Completed masters | 6.0% | 9.6% | 11.5% |
| Completed professional degree | 1.7% | 2.6% | 3.3% |
| Completed doctorate | 0.5% | 1.1% | 1.3% |
There are a total of 29 public schools, 6 private schools and 3 post-secondary schools in Harlingen. Using the proficiency score averages, the average test scores for Harlingen, TX schools is 48%. The average student to teacher ratio is 16:1. In Harlingen, TX, an average of 71.7% of students have completed 8th grade and an average of 69.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Combes, TX | 3,016 | 65% | 34.4% |
| Olmito, TX | 1,255 | 63% | 30.2% |
| Los Fresnos, TX | 7,767 | 57% | 17.9% |
| La Feria, TX | 7,276 | 45% | 7.0% |
| San Benito, TX | 24,259 | 43% | 10.8% |
| Harlingen, TX | 65,028 | 48% | 0.7% |
| City | Population | Avg. Test Scores | National Avg. |
| Santa Cruz, CA | 65,011 | 52% | 7.9% |
| Blaine, MN | 65,048 | 55% | 14.3% |
| Laguna Niguel, CA | 65,048 | 66% | 38.3% |
| Wellington, FL | 64,990 | 74% | 54.5% |
| Bethesda, MD | 65,092 | 77% | 60.6% |
| Harlingen, TX | 65,028 | 48% | 0.7% |
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