| Index | Plymouth | Iowa | National |
| Average Test Scores | n/a | 69% | 48% |
| Student/Teacher ratio | n/a | 13:1 | 16:1 |
| Total public schools | n/a | 1,101 | 79,221 |
| Total private schools | n/a | 208 | 24,874 |
| Total post-secondary schools | n/a | 96 | 7,963 |
| Index | Plymouth | Iowa | National |
| Completed 8th grade | 87.3% | 89.2% | 84.3% |
| Completed high school | 85.4% | 87.7% | 83.0% |
| Completed some college | 60.0% | 59.8% | 59.4% |
| Completed associate degree | 30.8% | 38.4% | 38.5% |
| Completed bachelors | 12.3% | 27.2% | 30.3% |
| Completed masters | 1.9% | 8.7% | 11.5% |
| Completed professional degree | 0.0% | 2.7% | 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 Plymouth. Using the proficiency score averages, the average test scores for Plymouth, IA schools is n/a. The average student to teacher ratio is n/a. In Plymouth, IA, an average of 87.3% of students have completed 8th grade and an average of 85.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| St. Ansgar, IA | 1,144 | 81% | 69.4% |
| Manly, IA | 1,480 | 78% | 61.5% |
| Rockford, IA | 827 | 75% | 55.2% |
| Clear Lake, IA | 7,594 | 73% | 52.4% |
| Northwood, IA | 2,182 | 67% | 39.6% |
| Plymouth, IA | 466 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Tishomingo, MS | 466 | 41% | 14.6% |
| New Alexandria, PA | 466 | 65% | 34.4% |
| Parker, ID | 466 | 60% | 25.0% |
| Bayfield, WI | 466 | 24% | 51.0% |
| Dodge, NE | 467 | 70% | 45.8% |
| Plymouth, IA | 466 | n/a |
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