| Index | Sidney | Montana | National |
| Average Test Scores | 49% | 45% | 48% |
| Student/Teacher ratio | 11:1 | 14:1 | 16:1 |
| Total public schools | 7 | 408 | 79,221 |
| Total private schools | 1 | 77 | 24,874 |
| Total post-secondary schools | n/a | 32 | 7,963 |
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| Index | Sidney | Montana | National |
| Completed 8th grade | 86.8% | 89.4% | 84.3% |
| Completed high school | 84.4% | 88.2% | 83.0% |
| Completed some college | 54.9% | 63.1% | 59.4% |
| Completed associate degree | 29.0% | 38.6% | 38.5% |
| Completed bachelors | 18.1% | 29.9% | 30.3% |
| Completed masters | 5.2% | 9.8% | 11.5% |
| Completed professional degree | 0.9% | 3.0% | 3.3% |
| Completed doctorate | 0.3% | 1.2% | 1.3% |
There are a total of 7 public schools, 1 private schools and n/a post-secondary schools in Sidney. Using the proficiency score averages, the average test scores for Sidney, MT schools is 49%. The average student to teacher ratio is 11:1. In Sidney, MT, an average of 86.8% of students have completed 8th grade and an average of 84.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Fairview, MT | 1,015 | 52% | 7.8% |
| Sidney, MT | 6,559 | 49% | 2.9% |
| City | Population | Avg. Test Scores | National Avg. |
| Brunswick, MD | 6,559 | 48% | 1.0% |
| Fowler, CA | 6,556 | 46% | 4.9% |
| Hamlet, NC | 6,555 | 49% | 2.3% |
| Kingston, RI | 6,555 | 53% | 10.9% |
| Chillicothe, IL | 6,552 | 46% | 4.0% |
| Sidney, MT | 6,559 | 49% | 2.9% |
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