This was 27.6 percent lower than the state average of 41.9 percent. In 2020 the total municipality population reached 3,432.
77.6 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 | 507 | 22.4 |
| Regular high school diploma | 450 | 19.9 |
| GED or alternative credential | 252 | 11.2 |
| Some college, less than 1 year | 304 | 13.5 |
| Some college, 1 or more years, no degree | 424 | 18.8 |
| Associate's degree | 172 | 7.6 |
| Bachelor's degree | 115 | 5.1 |
| Master's degree | 36 | 1.6 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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