This was 0.7 percent higher than the state average of 42.7 percent. In 2020 the total municipality population reached 9,963.
88.3 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Charter Oak CDP for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 816 | 11.7 |
| Regular high school diploma | 1,430 | 20.5 |
| GED or alternative credential | 103 | 1.5 |
| Some college, less than 1 year | 411 | 5.9 |
| Some college, 1 or more years, no degree | 1,182 | 17 |
| Associate's degree | 801 | 11.5 |
| Bachelor's degree | 1,778 | 25.5 |
| Master's degree | 366 | 5.3 |
| Professional school degree | 75 | 1.1 |
| Doctorate degree | 0 | 0 |
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