| Index | Plymouth | Indiana | National |
| Average Test Scores | 44% | 46% | 48% |
| Student/Teacher ratio | 21:1 | 22:1 | 16:1 |
| Total public schools | 6 | 1,755 | 79,221 |
| Total private schools | 1 | 675 | 24,874 |
| Total post-secondary schools | n/a | 141 | 7,963 |
| Index | Plymouth | Indiana | National |
| Completed 8th grade | 75.7% | 84.6% | 84.3% |
| Completed high school | 71.4% | 82.9% | 83.0% |
| Completed some college | 37.5% | 53.8% | 59.4% |
| Completed associate degree | 22.9% | 33.0% | 38.5% |
| Completed bachelors | 15.3% | 24.6% | 30.3% |
| Completed masters | 5.0% | 8.9% | 11.5% |
| Completed professional degree | 0.7% | 2.4% | 3.3% |
| Completed doctorate | 0.0% | 1.0% | 1.3% |
There are a total of 6 public schools, 1 private schools and n/a post-secondary schools in Plymouth. Using the proficiency score averages, the average test scores for Plymouth, IN schools is 44%. The average student to teacher ratio is 21:1. In Plymouth, IN, an average of 75.7% of students have completed 8th grade and an average of 71.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| North Liberty, IN | 1,822 | 65% | 34.4% |
| Bourbon, IN | 1,942 | 58% | 20.8% |
| Walkerton, IN | 2,344 | 57% | 18.8% |
| Argos, IN | 1,799 | 57% | 18.8% |
| Bremen, IN | 4,484 | 53% | 10.4% |
| Plymouth, IN | 10,029 | 44% | 7.6% |
| City | Population | Avg. Test Scores | National Avg. |
| Brandon, SD | 10,030 | 70% | 46.0% |
| Berlin, NH | 10,025 | 36% | 25.7% |
| Elkhorn, WI | 10,034 | 40% | 16.1% |
| Rodeo, CA | 10,023 | 28% | 42.7% |
| Holmen, WI | 10,023 | 53% | 10.2% |
| Plymouth, IN | 10,029 | 44% | 7.6% |
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