| Index | Denison | Iowa | National |
| Average Test Scores | 63% | 69% | 48% |
| Student/Teacher ratio | 14:1 | 13:1 | 16:1 |
| Total public schools | 3 | 1,101 | 79,221 |
| Total private schools | 2 | 208 | 24,874 |
| Total post-secondary schools | 1 | 96 | 7,963 |
| Index | Denison | Iowa | National |
| Completed 8th grade | 65.1% | 89.2% | 84.3% |
| Completed high school | 62.1% | 87.7% | 83.0% |
| Completed some college | 35.4% | 59.8% | 59.4% |
| Completed associate degree | 18.2% | 38.4% | 38.5% |
| Completed bachelors | 10.7% | 27.2% | 30.3% |
| Completed masters | 2.4% | 8.7% | 11.5% |
| Completed professional degree | 0.9% | 2.7% | 3.3% |
| Completed doctorate | 0.0% | 1.1% | 1.3% |
There are a total of 3 public schools, 2 private schools and 1 post-secondary schools in Denison. Using the proficiency score averages, the average test scores for Denison, IA schools is 63%. The average student to teacher ratio is 14:1. In Denison, IA, an average of 65.1% of students have completed 8th grade and an average of 62.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Manning, IA | 1,603 | 76% | 57.8% |
| Dow City, IA | 449 | 75% | 55.2% |
| Schleswig, IA | 1,015 | 74% | 53.1% |
| Dunlap, IA | 1,246 | 70% | 44.8% |
| Westside, IA | 258 | 69% | 42.7% |
| Denison, IA | 8,630 | 63% | 31.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Mascoutah, IL | 8,629 | 54% | 11.5% |
| Harwood Heights, IL | 8,628 | 55% | 13.5% |
| Virginia, MN | 8,634 | 49% | 2.3% |
| Millersville, PA | 8,625 | 74% | 54.7% |
| Mason, MI | 8,624 | 54% | 12.5% |
| Denison, IA | 8,630 | 63% | 31.3% |
Here are the best places to live in Iowa
Most Dangerous States In The US
See the best places to live in Denison
These are the largest cities in Iowa