| Index | Sullivan's Island | South Carolina | National |
| Average Test Scores | 76% | 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 | Sullivan's Island | South Carolina | National |
| Completed 8th grade | 97.8% | 83.0% | 84.3% |
| Completed high school | 97.8% | 81.6% | 83.0% |
| Completed some college | 94.4% | 56.6% | 59.4% |
| Completed associate degree | 83.9% | 35.6% | 38.5% |
| Completed bachelors | 80.1% | 26.5% | 30.3% |
| Completed masters | 37.3% | 9.6% | 11.5% |
| Completed professional degree | 19.6% | 2.5% | 3.3% |
| Completed doctorate | 5.7% | 1.1% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Sullivan's Island. Using the proficiency score averages, the average test scores for Sullivan's Island, SC schools is 76%. The average student to teacher ratio is n/a. In Sullivan's Island, SC, an average of 97.8% of students have completed 8th grade and an average of 97.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Mount Pleasant, SC | 89,410 | 78% | 62.2% |
| Hanahan, SC | 25,743 | 58% | 20.8% |
| Charleston, SC | 137,041 | 48% | 0.6% |
| North Charleston, SC | 113,880 | 37% | 23.8% |
| Sullivan's Island, SC | 2,177 | 76% | 57.3% |
| City | Population | Avg. Test Scores | National Avg. |
| Leslie, MI | 2,178 | 39% | 18.0% |
| Mulino, OR | 2,178 | 55% | 13.5% |
| Madison, NC | 2,178 | 39% | 19.1% |
| Edgerton, OH | 2,175 | 75% | 55.2% |
| Whitney, TX | 2,179 | 40% | 17.0% |
| Sullivan's Island, SC | 2,177 | 76% | 57.3% |
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