| Index | Delaware | Oklahoma | National |
| Average Test Scores | n/a | 32% | 48% |
| Student/Teacher ratio | n/a | 22:1 | 16:1 |
| Total public schools | n/a | 1,346 | 79,221 |
| Total private schools | n/a | 159 | 24,874 |
| Total post-secondary schools | n/a | 178 | 7,963 |
| Index | Delaware | Oklahoma | National |
| Completed 8th grade | 74.5% | 83.5% | 84.3% |
| Completed high school | 71.3% | 82.2% | 83.0% |
| Completed some college | 28.3% | 55.6% | 59.4% |
| Completed associate degree | 7.6% | 31.9% | 38.5% |
| Completed bachelors | 2.8% | 24.5% | 30.3% |
| Completed masters | 0.0% | 8.1% | 11.5% |
| Completed professional degree | 0.0% | 2.3% | 3.3% |
| Completed doctorate | 0.0% | 1.0% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Delaware. Using the proficiency score averages, the average test scores for Delaware, OK schools is n/a. The average student to teacher ratio is n/a. In Delaware, OK, an average of 74.5% of students have completed 8th grade and an average of 71.3% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Nowata, OK | 3,673 | 31% | 36.5% |
| South Coffeyville, OK | 828 | 27% | 43.3% |
| Delaware, OK | 388 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Miles, IA | 388 | 65% | 34.4% |
| Grand Junction, TN | 388 | 17% | 64.6% |
| Maupin, OR | 387 | 42% | 12.0% |
| Enola, AR | 389 | 52% | 8.3% |
| Underwood, MN | 389 | 57% | 18.8% |
| Delaware, OK | 388 | n/a |
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