| Index | Williamson | 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 | Williamson | Illinois | National |
| Completed 8th grade | 76.4% | 86.2% | 84.3% |
| Completed high school | 75.8% | 84.7% | 83.0% |
| Completed some college | 27.4% | 61.8% | 59.4% |
| Completed associate degree | 15.3% | 40.7% | 38.5% |
| Completed bachelors | 3.8% | 32.9% | 30.3% |
| Completed masters | 0.0% | 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 Williamson. Using the proficiency score averages, the average test scores for Williamson, IL schools is n/a. The average student to teacher ratio is n/a. In Williamson, IL, an average of 76.4% of students have completed 8th grade and an average of 75.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Worden, IL | 875 | 57% | 18.8% |
| Alhambra, IL | 676 | 55% | 14.6% |
| Marine, IL | 994 | 55% | 13.5% |
| Edwardsville, IL | 25,332 | 53% | 9.5% |
| Pocahontas, IL | 797 | 47% | 2.1% |
| Williamson, IL | 202 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Welch, TX | 202 | 25% | 49.0% |
| Cheraw, CO | 202 | 30% | 38.5% |
| Cainsville, MO | 203 | 35% | 27.1% |
| Sand Coulee, MT | 201 | 54% | 11.7% |
| Darlington, PA | 201 | 52% | 8.3% |
| Williamson, IL | 202 | n/a |
Here are the best places to live in Illinois
See the best places to live in Williamson
Check out the 10 most dangerous cities in Illinois
Safest States In The US