| Index | Irwin | 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 | Irwin | South Carolina | National |
| Completed 8th grade | 70.4% | 83.0% | 84.3% |
| Completed high school | 68.0% | 81.6% | 83.0% |
| Completed some college | 30.6% | 56.6% | 59.4% |
| Completed associate degree | 11.6% | 35.6% | 38.5% |
| Completed bachelors | 7.5% | 26.5% | 30.3% |
| Completed masters | 2.2% | 9.6% | 11.5% |
| Completed professional degree | 2.2% | 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 Irwin. Using the proficiency score averages, the average test scores for Irwin, SC schools is n/a. The average student to teacher ratio is n/a. In Irwin, SC, an average of 70.4% of students have completed 8th grade and an average of 68.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Richburg, SC | 357 | 56% | 17.0% |
| Kershaw, SC | 1,834 | 52% | 8.5% |
| Elgin, SC | 2,942 | 50% | 3.6% |
| Heath Springs, SC | 663 | 45% | 7.3% |
| Lancaster, SC | 9,482 | 42% | 11.9% |
| Irwin, SC | 1,335 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Farmingdale, NJ | 1,336 | 60% | 24.2% |
| Newberry, MI | 1,334 | 33% | 32.3% |
| Toulon, IL | 1,336 | 26% | 45.8% |
| Fraser, CO | 1,334 | 52% | 8.3% |
| Black Rock, NM | 1,336 | 10% | 79.7% |
| Irwin, SC | 1,335 | n/a |
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