| Index | Gilmer | Texas | National |
| Average Test Scores | 44% | 47% | 48% |
| Student/Teacher ratio | 13:1 | 14:1 | 16:1 |
| Total public schools | 6 | 7,418 | 79,221 |
| Total private schools | n/a | 1,267 | 24,874 |
| Total post-secondary schools | n/a | 463 | 7,963 |
| Index | Gilmer | Texas | National |
| Completed 8th grade | 76.4% | 79.3% | 84.3% |
| Completed high school | 75.3% | 77.8% | 83.0% |
| Completed some college | 45.8% | 57.3% | 59.4% |
| Completed associate degree | 21.3% | 34.9% | 38.5% |
| Completed bachelors | 17.1% | 28.1% | 30.3% |
| Completed masters | 6.1% | 9.6% | 11.5% |
| Completed professional degree | 1.4% | 2.6% | 3.3% |
| Completed doctorate | 0.2% | 1.1% | 1.3% |
There are a total of 6 public schools, n/a private schools and n/a post-secondary schools in Gilmer. Using the proficiency score averages, the average test scores for Gilmer, TX schools is 44%. The average student to teacher ratio is 13:1. In Gilmer, TX, an average of 76.4% of students have completed 8th grade and an average of 75.3% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| White Oak, TX | 6,301 | 56% | 17.4% |
| Gladewater, TX | 5,960 | 53% | 9.4% |
| Hawkins, TX | 1,641 | 52% | 7.8% |
| Longview, TX | 82,183 | 49% | 2.4% |
| Ore City, TX | 1,034 | 45% | 6.9% |
| Gilmer, TX | 5,139 | 44% | 9.4% |
| City | Population | Avg. Test Scores | National Avg. |
| Jackson, GA | 5,138 | 32% | 33.3% |
| Ayden, NC | 5,138 | 36% | 25.7% |
| Schuylkill Haven, PA | 5,137 | 59% | 22.1% |
| Wolfforth, TX | 5,137 | 60% | 24.0% |
| Birdsboro, PA | 5,141 | 73% | 51.0% |
| Gilmer, TX | 5,139 | 44% | 9.4% |
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