| Index | Niantic | Illinois | National |
| Average Test Scores | 37% | 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 | Niantic | Illinois | National |
| Completed 8th grade | 82.4% | 86.2% | 84.3% |
| Completed high school | 82.4% | 84.7% | 83.0% |
| Completed some college | 44.6% | 61.8% | 59.4% |
| Completed associate degree | 23.7% | 40.7% | 38.5% |
| Completed bachelors | 20.9% | 32.9% | 30.3% |
| Completed masters | 7.1% | 12.7% | 11.5% |
| Completed professional degree | 0.0% | 3.4% | 3.3% |
| Completed doctorate | 0.0% | 1.2% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Niantic. Using the proficiency score averages, the average test scores for Niantic, IL schools is 37%. The average student to teacher ratio is n/a. In Niantic, IL, an average of 82.4% of students have completed 8th grade and an average of 82.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Stonington, IL | 671 | 50% | 4.2% |
| Forsyth, IL | 3,474 | 48% | 1.0% |
| Mount Zion, IL | 5,707 | 44% | 8.9% |
| Maroa, IL | 1,982 | 40% | 17.2% |
| Illiopolis, IL | 767 | 38% | 20.3% |
| Niantic, IL | 657 | 37% | 22.9% |
| City | Population | Avg. Test Scores | National Avg. |
| Ramona, OK | 657 | 20% | 58.9% |
| Hill City, MN | 657 | 38% | 20.5% |
| Taholah, WA | 657 | 29% | 39.6% |
| Canton, KS | 657 | 25% | 49.0% |
| Elizabeth, LA | 656 | 74% | 53.1% |
| Niantic, IL | 657 | 37% | 22.9% |
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