| Index | Clear Lake | South Dakota | National |
| Average Test Scores | 42% | 48% | 48% |
| Student/Teacher ratio | 17:1 | 14:1 | 16:1 |
| Total public schools | 3 | 340 | 79,221 |
| Total private schools | n/a | 76 | 24,874 |
| Total post-secondary schools | n/a | 25 | 7,963 |
| Index | Clear Lake | South Dakota | National |
| Completed 8th grade | 89.2% | 89.1% | 84.3% |
| Completed high school | 84.0% | 86.8% | 83.0% |
| Completed some college | 50.4% | 60.4% | 59.4% |
| Completed associate degree | 32.5% | 38.5% | 38.5% |
| Completed bachelors | 18.5% | 27.5% | 30.3% |
| Completed masters | 7.3% | 8.1% | 11.5% |
| Completed professional degree | 2.7% | 2.5% | 3.3% |
| Completed doctorate | 1.3% | 1.2% | 1.3% |
There are a total of 3 public schools, n/a private schools and n/a post-secondary schools in Clear Lake. Using the proficiency score averages, the average test scores for Clear Lake, SD schools is 42%. The average student to teacher ratio is 17:1. In Clear Lake, SD, an average of 89.2% of students have completed 8th grade and an average of 84.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Toronto, SD | 267 | 62% | 29.2% |
| Estelline, SD | 858 | 51% | 5.6% |
| Clear Lake, SD | 1,503 | 42% | 12.2% |
| City | Population | Avg. Test Scores | National Avg. |
| Mount Carroll, IL | 1,503 | 17% | 65.6% |
| Battle Creek, NE | 1,503 | 60% | 24.0% |
| Erie, KS | 1,503 | 31% | 35.4% |
| Oakdale, PA | 1,503 | 78% | 63.0% |
| Wood River, NE | 1,503 | 58% | 20.8% |
| Clear Lake, SD | 1,503 | 42% | 12.2% |
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