| Index | Williamson | 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 | Williamson | Iowa | National |
| Completed 8th grade | 76.3% | 89.2% | 84.3% |
| Completed high school | 73.8% | 87.7% | 83.0% |
| Completed some college | 32.5% | 59.8% | 59.4% |
| Completed associate degree | 20.0% | 38.4% | 38.5% |
| Completed bachelors | 2.5% | 27.2% | 30.3% |
| Completed masters | 0.0% | 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 Williamson. Using the proficiency score averages, the average test scores for Williamson, IA schools is n/a. The average student to teacher ratio is n/a. In Williamson, IA, an average of 76.3% of students have completed 8th grade and an average of 73.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Milo, IA | 781 | 70% | 45.8% |
| Chariton, IA | 4,127 | 69% | 43.1% |
| Lacona, IA | 339 | 62% | 29.2% |
| Melcher-Dallas, IA | 1,313 | 53% | 10.8% |
| Williamson, IA | 184 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| East Lynne, MO | 184 | 57% | 18.8% |
| Spokane, MO | 184 | 55% | 14.1% |
| Warba, MN | 184 | 50% | 4.2% |
| Bartlett, NH | 184 | 65% | 34.4% |
| Litchfield, CA | 183 | 35% | 28.1% |
| Williamson, IA | 184 | n/a |
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