| Index | Crystal 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 | Crystal Lake | Iowa | National |
| Completed 8th grade | 84.5% | 89.2% | 84.3% |
| Completed high school | 84.5% | 87.7% | 83.0% |
| Completed some college | 31.0% | 59.8% | 59.4% |
| Completed associate degree | 13.5% | 38.4% | 38.5% |
| Completed bachelors | 3.9% | 27.2% | 30.3% |
| Completed masters | 1.3% | 8.7% | 11.5% |
| Completed professional degree | 0.0% | 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 Crystal Lake. Using the proficiency score averages, the average test scores for Crystal Lake, IA schools is n/a. The average student to teacher ratio is n/a. In Crystal Lake, IA, an average of 84.5% of students have completed 8th grade and an average of 84.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Garner, IA | 3,060 | 78% | 63.0% |
| Forest City, IA | 4,117 | 75% | 55.9% |
| Lake Mills, IA | 2,108 | 75% | 55.6% |
| Britt, IA | 1,761 | 74% | 53.1% |
| Buffalo Center, IA | 969 | 61% | 27.8% |
| Crystal Lake, IA | 264 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Canaan, NH | 264 | 43% | 10.1% |
| Bliss, ID | 264 | 42% | 12.5% |
| Des Lacs, ND | 264 | 40% | 16.7% |
| Bunker, MO | 264 | 45% | 6.8% |
| Great Meadows, NJ | 264 | 66% | 37.0% |
| Crystal Lake, IA | 264 | n/a |
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