| Index | St. James | New York | National |
| Average Test Scores | 76% | 56% | 48% |
| Student/Teacher ratio | n/a | n/a | 16:1 |
| Total public schools | 3 | 4,060 | 79,221 |
| Total private schools | 3 | 1,092 | 24,874 |
| Total post-secondary schools | n/a | 483 | 7,963 |
| Index | St. James | New York | National |
| Completed 8th grade | 92.4% | 83.5% | 84.3% |
| Completed high school | 92.0% | 82.1% | 83.0% |
| Completed some college | 69.4% | 59.5% | 59.4% |
| Completed associate degree | 51.3% | 43.4% | 38.5% |
| Completed bachelors | 42.3% | 34.7% | 30.3% |
| Completed masters | 20.8% | 15.1% | 11.5% |
| Completed professional degree | 5.5% | 4.2% | 3.3% |
| Completed doctorate | 1.3% | 1.5% | 1.3% |
There are a total of 3 public schools, 3 private schools and n/a post-secondary schools in St. James. Using the proficiency score averages, the average test scores for St. James, NY schools is 76%. The average student to teacher ratio is n/a. In St. James, NY, an average of 92.4% of students have completed 8th grade and an average of 92.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| West Sayville, NY | 4,956 | 82% | 69.8% |
| Shoreham, NY | 375 | 82% | 69.8% |
| Hauppauge, NY | 19,661 | 80% | 66.3% |
| Setauket-East Setauket, NY | 14,174 | 80% | 65.6% |
| Elwood, NY | 11,582 | 79% | 63.5% |
| St. James, NY | 13,533 | 76% | 59.0% |
| City | Population | Avg. Test Scores | National Avg. |
| Ridge, NY | 13,537 | 57% | 18.8% |
| Federal Heights, CO | 13,537 | 24% | 50.0% |
| Bay St. Louis, MS | 13,539 | 49% | 2.9% |
| Sault Ste. Marie, MI | 13,526 | 44% | 8.2% |
| Brecksville, OH | 13,521 | 92% | 90.9% |
| St. James, NY | 13,533 | 76% | 59.0% |
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