| Index | Heidelberg | Texas | National |
| Average Test Scores | n/a | 47% | 48% |
| Student/Teacher ratio | n/a | 14:1 | 16:1 |
| Total public schools | n/a | 7,418 | 79,221 |
| Total private schools | n/a | 1,267 | 24,874 |
| Total post-secondary schools | n/a | 463 | 7,963 |
| Index | Heidelberg | Texas | National |
| Completed 8th grade | 67.7% | 79.3% | 84.3% |
| Completed high school | 66.8% | 77.8% | 83.0% |
| Completed some college | 50.1% | 57.3% | 59.4% |
| Completed associate degree | 27.0% | 34.9% | 38.5% |
| Completed bachelors | 9.5% | 28.1% | 30.3% |
| Completed masters | 3.6% | 9.6% | 11.5% |
| Completed professional degree | 0.0% | 2.6% | 3.3% |
| Completed doctorate | 0.0% | 1.1% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Heidelberg. Using the proficiency score averages, the average test scores for Heidelberg, TX schools is n/a. The average student to teacher ratio is n/a. In Heidelberg, TX, an average of 67.7% of students have completed 8th grade and an average of 66.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Combes, TX | 3,016 | 65% | 34.4% |
| Harlingen, TX | 65,028 | 48% | 0.7% |
| Alamo, TX | 19,851 | 47% | 1.5% |
| Weslaco, TX | 41,103 | 46% | 4.0% |
| La Feria, TX | 7,276 | 45% | 7.0% |
| Heidelberg, TX | 1,724 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| De Pue, IL | 1,724 | 20% | 58.9% |
| Mechanicsville, MD | 1,724 | 55% | 15.0% |
| Hazen, AR | 1,724 | 37% | 22.4% |
| Sea Girt, NJ | 1,725 | 79% | 64.1% |
| Lakeland, MN | 1,723 | 72% | 50.0% |
| Heidelberg, TX | 1,724 | n/a |
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