| Index | Third Lake | Illinois | National |
| Average Test Scores | n/a | 33% | 48% |
| Student/Teacher ratio | n/a | 18:1 | 16:1 |
| Total public schools | n/a | 3,938 | 79,221 |
| Total private schools | n/a | 1,438 | 24,874 |
| Total post-secondary schools | n/a | 306 | 7,963 |
| Index | Third Lake | Illinois | National |
| Completed 8th grade | 98.1% | 86.2% | 84.3% |
| Completed high school | 98.1% | 84.7% | 83.0% |
| Completed some college | 84.7% | 61.8% | 59.4% |
| Completed associate degree | 67.3% | 40.7% | 38.5% |
| Completed bachelors | 60.9% | 32.9% | 30.3% |
| Completed masters | 27.4% | 12.7% | 11.5% |
| Completed professional degree | 7.4% | 3.4% | 3.3% |
| Completed doctorate | 5.0% | 1.2% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Third Lake. Using the proficiency score averages, the average test scores for Third Lake, IL schools is n/a. The average student to teacher ratio is n/a. In Third Lake, IL, an average of 98.1% of students have completed 8th grade and an average of 98.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Lincolnshire, IL | 7,694 | 78% | 62.8% |
| Bannockburn, IL | 1,194 | 77% | 60.4% |
| Deerfield, IL | 19,030 | 77% | 59.4% |
| Libertyville, IL | 20,300 | 71% | 48.7% |
| Long Grove, IL | 7,907 | 70% | 46.5% |
| Third Lake, IL | 1,160 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Mahnomen, MN | 1,160 | 33% | 30.7% |
| Mount Ida, AR | 1,160 | 46% | 4.7% |
| Atglen, PA | 1,160 | 55% | 14.2% |
| Limon, CO | 1,161 | 45% | 7.3% |
| Mariposa, CA | 1,159 | 43% | 9.7% |
| Third Lake, IL | 1,160 | n/a |
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