This was 16.9 percent lower than the state average of 41 percent. In 2020 the total municipality population reached 1,172.
87.8 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Williamstown for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 99 | 12.2 |
| Regular high school diploma | 333 | 41 |
| GED or alternative credential | 29 | 3.6 |
| Some college, less than 1 year | 69 | 8.5 |
| Some college, 1 or more years, no degree | 86 | 10.6 |
| Associate's degree | 99 | 12.2 |
| Bachelor's degree | 81 | 10 |
| Master's degree | 10 | 1.2 |
| Professional school degree | 6 | 0.7 |
| Doctorate degree | 0 | 0 |
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