| Index | Mason City | Illinois | National |
| Average Test Scores | 21% | 31% | 49% |
| Student/Teacher ratio | 14:1 | 18:1 | 16:1 |
| Total public schools | 2 | 3,938 | 79,221 |
| Total private schools | n/a | 1,438 | 24,874 |
| Total post-secondary schools | n/a | 306 | 7,963 |
| Index | Mason City | Illinois | National |
| Completed 8th grade | 82.0% | 86.2% | 84.3% |
| Completed high school | 80.7% | 84.7% | 83.0% |
| Completed some college | 40.0% | 61.8% | 59.4% |
| Completed associate degree | 14.9% | 40.7% | 38.5% |
| Completed bachelors | 9.8% | 32.9% | 30.3% |
| Completed masters | 4.5% | 12.7% | 11.5% |
| Completed professional degree | 1.4% | 3.4% | 3.3% |
| Completed doctorate | 0.9% | 1.2% | 1.3% |
There are a total of 2 public schools, n/a private schools and n/a post-secondary schools in Mason City. Using the proficiency score averages, the average test scores for Mason City, IL schools is 21%. The average student to teacher ratio is 14:1. In Mason City, IL, an average of 82.0% of students have completed 8th grade and an average of 80.7% have completed high school.
| City, State | Population | Avg. Test Scores | National Avg. |
| Delavan, IL | 1,600 | 38% | 23% |
| Emden, IL | 339 | 30% | 40% |
| Greenview, IL | 844 | 25% | 50% |
| Hartsburg, IL | 251 | 25% | 50% |
| Green Valley, IL | 689 | 22% | 56% |
| Mason City, IL | 2,272 | 21% | 57% |
| City, State | Population | Avg. Test Scores | National Avg. |
| West Lafayette, OH | 2,272 | 72% | 46% |
| South Congaree, SC | 2,272 | 31% | 37% |
| Decatur, AR | 2,272 | 15% | 69% |
| Arcanum, OH | 2,272 | 79% | 60% |
| Jamestown West, NY | 2,272 | 61% | 23% |
| Mason City, IL | 2,272 | 21% | 57% |
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