| Index | Joanna | South Carolina | National |
| Average Test Scores | 35% | 47% | 48% |
| Student/Teacher ratio | 16:1 | 16:1 | 16:1 |
| Total public schools | 1 | 932 | 79,221 |
| Total private schools | n/a | 369 | 24,874 |
| Total post-secondary schools | n/a | 96 | 7,963 |
| Index | Joanna | South Carolina | National |
| Completed 8th grade | 74.5% | 83.0% | 84.3% |
| Completed high school | 74.5% | 81.6% | 83.0% |
| Completed some college | 41.6% | 56.6% | 59.4% |
| Completed associate degree | 19.8% | 35.6% | 38.5% |
| Completed bachelors | 12.4% | 26.5% | 30.3% |
| Completed masters | 3.8% | 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 1 public schools, n/a private schools and n/a post-secondary schools in Joanna. Using the proficiency score averages, the average test scores for Joanna, SC schools is 35%. The average student to teacher ratio is 16:1. In Joanna, SC, an average of 74.5% of students have completed 8th grade and an average of 74.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Clinton, SC | 8,347 | 42% | 12.2% |
| Whitmire, SC | 1,641 | 41% | 15.1% |
| Waterloo, SC | 181 | 37% | 22.9% |
| Laurens, SC | 8,863 | 37% | 23.6% |
| Newberry, SC | 10,219 | 37% | 24.0% |
| Joanna, SC | 1,270 | 35% | 28.1% |
| City | Population | Avg. Test Scores | National Avg. |
| Beaverton, MI | 1,270 | 33% | 30.7% |
| Renville, MN | 1,271 | 47% | 2.1% |
| Fayette, OH | 1,271 | 66% | 37.0% |
| Friars Point, MS | 1,269 | 22% | 54.2% |
| Inman, KS | 1,271 | 41% | 15.1% |
| Joanna, SC | 1,270 | 35% | 28.1% |
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