| Index | Williamston | South Carolina | National |
| Average Test Scores | 59% | 47% | 48% |
| Student/Teacher ratio | 17:1 | 16:1 | 16:1 |
| Total public schools | 6 | 932 | 79,221 |
| Total private schools | 1 | 369 | 24,874 |
| Total post-secondary schools | n/a | 96 | 7,963 |
| Index | Williamston | South Carolina | National |
| Completed 8th grade | 82.2% | 83.0% | 84.3% |
| Completed high school | 81.0% | 81.6% | 83.0% |
| Completed some college | 49.2% | 56.6% | 59.4% |
| Completed associate degree | 25.8% | 35.6% | 38.5% |
| Completed bachelors | 15.4% | 26.5% | 30.3% |
| Completed masters | 6.8% | 9.6% | 11.5% |
| Completed professional degree | 0.0% | 2.5% | 3.3% |
| Completed doctorate | 0.0% | 1.1% | 1.3% |
There are a total of 6 public schools, 1 private schools and n/a post-secondary schools in Williamston. Using the proficiency score averages, the average test scores for Williamston, SC schools is 59%. The average student to teacher ratio is 17:1. In Williamston, SC, an average of 82.2% of students have completed 8th grade and an average of 81.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Mauldin, SC | 25,829 | 69% | 42.7% |
| Simpsonville, SC | 23,200 | 63% | 31.7% |
| West Pelzer, SC | 1,049 | 61% | 26.0% |
| Pelzer, SC | 1,653 | 58% | 21.4% |
| Belton, SC | 4,436 | 56% | 15.6% |
| Williamston, SC | 4,219 | 59% | 23.2% |
| City | Population | Avg. Test Scores | National Avg. |
| Le Roy, NY | 4,220 | 56% | 17.2% |
| Apison, TN | 4,220 | 69% | 43.8% |
| Pittsboro, NC | 4,221 | 55% | 15.4% |
| Lafayette, OR | 4,222 | 60% | 24.0% |
| Bellingham, MA | 4,216 | 51% | 5.4% |
| Williamston, SC | 4,219 | 59% | 23.2% |
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