| Index | Diamondhead Lake | Iowa | National |
| Average Test Scores | n/a | 69% | 48% |
| Student/Teacher ratio | n/a | 13:1 | 16:1 |
| Total public schools | n/a | 1,101 | 79,221 |
| Total private schools | n/a | 208 | 24,874 |
| Total post-secondary schools | n/a | 96 | 7,963 |
| Index | Diamondhead Lake | Iowa | National |
| Completed 8th grade | 92.9% | 89.2% | 84.3% |
| Completed high school | 81.2% | 87.7% | 83.0% |
| Completed some college | 52.3% | 59.8% | 59.4% |
| Completed associate degree | 30.5% | 38.4% | 38.5% |
| Completed bachelors | 24.7% | 27.2% | 30.3% |
| Completed masters | 6.7% | 8.7% | 11.5% |
| Completed professional degree | 6.7% | 2.7% | 3.3% |
| Completed doctorate | 0.0% | 1.1% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Diamondhead Lake. Using the proficiency score averages, the average test scores for Diamondhead Lake, IA schools is n/a. The average student to teacher ratio is n/a. In Diamondhead Lake, IA, an average of 92.9% of students have completed 8th grade and an average of 81.2% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Adel, IA | 4,924 | 84% | 74.5% |
| Dallas Center, IA | 1,710 | 81% | 68.2% |
| Guthrie Center, IA | 1,558 | 76% | 57.8% |
| Stuart, IA | 1,623 | 75% | 55.7% |
| Earlham, IA | 1,382 | 75% | 55.6% |
| Diamondhead Lake, IA | 258 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Haviland, OH | 258 | 72% | 50.0% |
| Ambrose, GA | 258 | 55% | 13.5% |
| Rock River, WY | 258 | 47% | 2.8% |
| Bovill, ID | 259 | 60% | 25.0% |
| Holy Cross, AK | 257 | 25% | 47.9% |
| Diamondhead Lake, IA | 258 | n/a |
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