| Index | Denison | Texas | National |
| Average Test Scores | 42% | 47% | 48% |
| Student/Teacher ratio | 14:1 | 14:1 | 16:1 |
| Total public schools | 15 | 7,418 | 79,221 |
| Total private schools | 1 | 1,267 | 24,874 |
| Total post-secondary schools | 1 | 463 | 7,963 |
| Index | Denison | Texas | National |
| Completed 8th grade | 80.4% | 79.3% | 84.3% |
| Completed high school | 78.6% | 77.8% | 83.0% |
| Completed some college | 52.4% | 57.3% | 59.4% |
| Completed associate degree | 26.2% | 34.9% | 38.5% |
| Completed bachelors | 16.6% | 28.1% | 30.3% |
| Completed masters | 5.6% | 9.6% | 11.5% |
| Completed professional degree | 1.3% | 2.6% | 3.3% |
| Completed doctorate | 0.8% | 1.1% | 1.3% |
There are a total of 15 public schools, 1 private schools and 1 post-secondary schools in Denison. Using the proficiency score averages, the average test scores for Denison, TX schools is 42%. The average student to teacher ratio is 14:1. In Denison, TX, an average of 80.4% of students have completed 8th grade and an average of 78.6% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Bells, TX | 1,473 | 61% | 27.4% |
| Savoy, TX | 740 | 53% | 10.9% |
| Pottsboro, TX | 2,404 | 52% | 8.7% |
| Southmayd, TX | 976 | 43% | 10.4% |
| Sherman, TX | 40,112 | 38% | 20.2% |
| Denison, TX | 23,080 | 42% | 13.4% |
| City | Population | Avg. Test Scores | National Avg. |
| Solon, OH | 23,085 | 95% | 97.9% |
| McDonough, GA | 23,086 | 38% | 20.9% |
| East Peoria, IL | 23,090 | 30% | 37.5% |
| Rosemount, MN | 23,099 | 52% | 8.5% |
| Munster, IN | 23,103 | 70% | 46.0% |
| Denison, TX | 23,080 | 42% | 13.4% |
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