This was 26.7 percent higher than the state average of 52.2 percent. In 2020 the total municipality population reached 4,565.
96.8 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 | 51 | 3.2 |
| Regular high school diploma | 146 | 9.1 |
| GED or alternative credential | 15 | 0.9 |
| Some college, less than 1 year | 21 | 1.3 |
| Some college, 1 or more years, no degree | 105 | 6.5 |
| Associate's degree | 64 | 4 |
| Bachelor's degree | 329 | 20.5 |
| Master's degree | 432 | 26.9 |
| Professional school degree | 115 | 7.2 |
| Doctorate degree | 327 | 20.4 |
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