| Index | Johnsonville | South Carolina | National |
| Average Test Scores | 52% | 47% | 48% |
| Student/Teacher ratio | 16:1 | 16:1 | 16:1 |
| Total public schools | 3 | 932 | 79,221 |
| Total private schools | n/a | 369 | 24,874 |
| Total post-secondary schools | n/a | 96 | 7,963 |
| Index | Johnsonville | South Carolina | National |
| Completed 8th grade | 80.4% | 83.0% | 84.3% |
| Completed high school | 78.7% | 81.6% | 83.0% |
| Completed some college | 53.5% | 56.6% | 59.4% |
| Completed associate degree | 32.9% | 35.6% | 38.5% |
| Completed bachelors | 22.1% | 26.5% | 30.3% |
| Completed masters | 7.5% | 9.6% | 11.5% |
| Completed professional degree | 1.6% | 2.5% | 3.3% |
| Completed doctorate | 0.8% | 1.1% | 1.3% |
There are a total of 3 public schools, n/a private schools and n/a post-secondary schools in Johnsonville. Using the proficiency score averages, the average test scores for Johnsonville, SC schools is 52%. The average student to teacher ratio is 16:1. In Johnsonville, SC, an average of 80.4% of students have completed 8th grade and an average of 78.7% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Aynor, SC | 785 | 64% | 32.6% |
| Pamplico, SC | 1,222 | 43% | 10.9% |
| Hemingway, SC | 522 | 34% | 29.0% |
| Johnsonville, SC | 1,175 | 52% | 8.0% |
| City | Population | Avg. Test Scores | National Avg. |
| Bouse, AZ | 1,175 | 30% | 37.5% |
| Bruceton, TN | 1,175 | 36% | 25.5% |
| Hydro, OK | 1,175 | 44% | 8.7% |
| Bogata, TX | 1,175 | 53% | 11.1% |
| Lindsay, TX | 1,176 | 75% | 55.2% |
| Johnsonville, SC | 1,175 | 52% | 8.0% |
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