| Index | Harker Heights | Texas | National |
| Average Test Scores | 50% | 47% | 48% |
| Student/Teacher ratio | 15:1 | 14:1 | 16:1 |
| Total public schools | 3 | 7,418 | 79,221 |
| Total private schools | 1 | 1,267 | 24,874 |
| Total post-secondary schools | n/a | 463 | 7,963 |
| Index | Harker Heights | Texas | National |
| Completed 8th grade | 89.5% | 79.3% | 84.3% |
| Completed high school | 88.6% | 77.8% | 83.0% |
| Completed some college | 72.3% | 57.3% | 59.4% |
| Completed associate degree | 42.9% | 34.9% | 38.5% |
| Completed bachelors | 33.6% | 28.1% | 30.3% |
| Completed masters | 11.5% | 9.6% | 11.5% |
| Completed professional degree | 2.0% | 2.6% | 3.3% |
| Completed doctorate | 1.1% | 1.1% | 1.3% |
There are a total of 3 public schools, 1 private schools and n/a post-secondary schools in Harker Heights. Using the proficiency score averages, the average test scores for Harker Heights, TX schools is 50%. The average student to teacher ratio is 15:1. In Harker Heights, TX, an average of 89.5% of students have completed 8th grade and an average of 88.6% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Fort Hood, TX | 23,302 | 57% | 19.5% |
| Salado, TX | 2,848 | 52% | 8.7% |
| Nolanville, TX | 5,732 | 50% | 3.6% |
| Belton, TX | 22,173 | 45% | 6.3% |
| Copperas Cove, TX | 32,960 | 42% | 12.3% |
| Harker Heights, TX | 31,657 | 50% | 4.7% |
| City | Population | Avg. Test Scores | National Avg. |
| Bowling Green, OH | 31,638 | 66% | 37.8% |
| American Fork, UT | 31,636 | 45% | 5.7% |
| Alamogordo, NM | 31,635 | 29% | 40.0% |
| Southlake, TX | 31,684 | 87% | 80.7% |
| Clearfield, UT | 31,622 | 40% | 17.6% |
| Harker Heights, TX | 31,657 | 50% | 4.7% |
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