This was 24.1 percent lower than the state average of 44.7 percent. In 2020 the total municipality population reached 364.
88.5 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Plymouth for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 29 | 11.5 |
| Regular high school diploma | 91 | 36.1 |
| GED or alternative credential | 20 | 7.9 |
| Some college, less than 1 year | 23 | 9.1 |
| Some college, 1 or more years, no degree | 37 | 14.7 |
| Associate's degree | 23 | 9.1 |
| Bachelor's degree | 16 | 6.3 |
| Master's degree | 13 | 5.2 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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