| Index | St. Clair | Michigan | National |
| Average Test Scores | 36% | 42% | 48% |
| Student/Teacher ratio | 18:1 | 22:1 | 16:1 |
| Total public schools | 5 | 3,421 | 79,221 |
| Total private schools | 2 | 835 | 24,874 |
| Total post-secondary schools | n/a | 196 | 7,963 |
| Index | St. Clair | Michigan | National |
| Completed 8th grade | 90.8% | 86.9% | 84.3% |
| Completed high school | 90.8% | 85.9% | 83.0% |
| Completed some college | 65.5% | 60.3% | 59.4% |
| Completed associate degree | 37.2% | 36.5% | 38.5% |
| Completed bachelors | 26.6% | 27.4% | 30.3% |
| Completed masters | 9.6% | 10.7% | 11.5% |
| Completed professional degree | 1.8% | 2.8% | 3.3% |
| Completed doctorate | 0.5% | 1.1% | 1.3% |
There are a total of 5 public schools, 2 private schools and n/a post-secondary schools in St. Clair. Using the proficiency score averages, the average test scores for St. Clair, MI schools is 36%. The average student to teacher ratio is 18:1. In St. Clair, MI, an average of 90.8% of students have completed 8th grade and an average of 90.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Emmett, MI | 256 | 67% | 39.6% |
| Marysville, MI | 9,695 | 60% | 24.1% |
| New Baltimore, MI | 12,333 | 59% | 22.1% |
| Richmond, MI | 5,851 | 46% | 5.2% |
| Memphis, MI | 1,064 | 45% | 6.8% |
| St. Clair, MI | 5,354 | 36% | 25.5% |
| City | Population | Avg. Test Scores | National Avg. |
| Macon, MO | 5,357 | 54% | 11.5% |
| Toronto, OH | 5,357 | 64% | 32.8% |
| Tonganoxie, KS | 5,357 | 32% | 33.7% |
| Weiser, ID | 5,358 | 44% | 9.1% |
| Englewood Cliffs, NJ | 5,349 | 87% | 80.2% |
| St. Clair, MI | 5,354 | 36% | 25.5% |
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