| Index | Trumbull | Connecticut | National |
| Average Test Scores | 79% | 53% | 48% |
| Student/Teacher ratio | 13:1 | 14:1 | 16:1 |
| Total public schools | 12 | 654 | 79,221 |
| Total private schools | 6 | 207 | 24,874 |
| Total post-secondary schools | n/a | 81 | 7,963 |
| Index | Trumbull | Connecticut | National |
| Completed 8th grade | 94.0% | 88.0% | 84.3% |
| Completed high school | 93.1% | 86.9% | 83.0% |
| Completed some college | 74.1% | 62.9% | 59.4% |
| Completed associate degree | 58.9% | 45.5% | 38.5% |
| Completed bachelors | 51.7% | 38.0% | 30.3% |
| Completed masters | 24.2% | 16.8% | 11.5% |
| Completed professional degree | 5.4% | 4.6% | 3.3% |
| Completed doctorate | 1.8% | 1.7% | 1.3% |
There are a total of 12 public schools, 6 private schools and n/a post-secondary schools in Trumbull. Using the proficiency score averages, the average test scores for Trumbull, CT schools is 79%. The average student to teacher ratio is 13:1. In Trumbull, CT, an average of 94.0% of students have completed 8th grade and an average of 93.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Darien, CT | 21,519 | 85% | 76.9% |
| Westport, CT | 27,511 | 84% | 75.7% |
| Southport, CT | 1,710 | 77% | 60.4% |
| Orange, CT | 13,928 | 75% | 55.7% |
| Newtown, CT | 1,921 | 71% | 48.8% |
| Trumbull, CT | 36,477 | 79% | 64.0% |
| City | Population | Avg. Test Scores | National Avg. |
| Dunedin, FL | 36,480 | 64% | 32.3% |
| Oakton, VA | 36,468 | 92% | 90.6% |
| Phenix City, AL | 36,461 | 47% | 2.9% |
| Bartlesville, OK | 36,495 | 36% | 24.8% |
| Kearns, UT | 36,457 | 25% | 48.1% |
| Trumbull, CT | 36,477 | 79% | 64.0% |
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