This was 13.2 percent lower than the state average of 46.3 percent. In 2020 the total municipality population reached 3,943.
90.8 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Putnam Lake for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 284 | 9.2 |
| Regular high school diploma | 866 | 28.1 |
| GED or alternative credential | 145 | 4.7 |
| Some college, less than 1 year | 163 | 5.3 |
| Some college, 1 or more years, no degree | 602 | 19.5 |
| Associate's degree | 214 | 6.9 |
| Bachelor's degree | 587 | 19.1 |
| Master's degree | 180 | 5.8 |
| Professional school degree | 32 | 1 |
| Doctorate degree | 7 | 0.2 |
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