This was 35.2 percent lower than the state average of 41 percent. In 2020 the total municipality population reached 278.
88.1 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Plainfield for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 33 | 11.9 |
| Regular high school diploma | 127 | 45.7 |
| GED or alternative credential | 86 | 30.9 |
| Some college, less than 1 year | 16 | 5.8 |
| Some college, 1 or more years, no degree | 0 | 0 |
| Associate's degree | 0 | 0 |
| Bachelor's degree | 16 | 5.8 |
| Master's degree | 0 | 0 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
Alerts Sign-up