| Index | Williams | South Carolina | National |
| Average Test Scores | n/a | 47% | 48% |
| Student/Teacher ratio | n/a | 16:1 | 16:1 |
| Total public schools | n/a | 932 | 79,221 |
| Total private schools | n/a | 369 | 24,874 |
| Total post-secondary schools | n/a | 96 | 7,963 |
| Index | Williams | South Carolina | National |
| Completed 8th grade | 85.9% | 83.0% | 84.3% |
| Completed high school | 85.9% | 81.6% | 83.0% |
| Completed some college | 59.6% | 56.6% | 59.4% |
| Completed associate degree | 40.4% | 35.6% | 38.5% |
| Completed bachelors | 21.2% | 26.5% | 30.3% |
| Completed masters | 8.1% | 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 n/a public schools, n/a private schools and n/a post-secondary schools in Williams. Using the proficiency score averages, the average test scores for Williams, SC schools is n/a. The average student to teacher ratio is n/a. In Williams, SC, an average of 85.9% of students have completed 8th grade and an average of 85.9% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Branchville, SC | 1,223 | 57% | 18.8% |
| Varnville, SC | 1,832 | 50% | 4.2% |
| Walterboro, SC | 5,417 | 27% | 42.9% |
| Williams, SC | 194 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Marble City, OK | 194 | 20% | 58.3% |
| Canadian, OK | 194 | 26% | 45.8% |
| Laurel, IA | 194 | 80% | 66.7% |
| New Paris, PA | 194 | 68% | 40.6% |
| Russian Mission, AK | 193 | 5% | 89.6% |
| Williams, SC | 194 | n/a |
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