| 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% |
| Madison, NC | 2,178 | 39% | 19.1% |
| Mulino, OR | 2,178 | 55% | 13.5% |
| Edgerton, OH | 2,175 | 75% | 55.2% |
| Whitney, TX | 2,179 | 40% | 17.0% |
| Sullivan's Island, SC | 2,177 | 76% | 57.3% |
Here are the best places to live in South Carolina
These are the 10 cheapest cities in South Carolina
Check out the 10 most dangerous cities in South Carolina
Check out the 10 safest cities in South Carolina