This was 18.7 percent lower than the state average of 33.6 percent. In 2020 the total municipality population reached 649.
69.1 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Sandy Hook for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 129 | 30.9 |
| Regular high school diploma | 143 | 34.3 |
| GED or alternative credential | 15 | 3.6 |
| Some college, less than 1 year | 14 | 3.4 |
| Some college, 1 or more years, no degree | 54 | 12.9 |
| Associate's degree | 23 | 5.5 |
| Bachelor's degree | 25 | 6 |
| Master's degree | 14 | 3.4 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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