This was 20 percent lower than the state average of 41.8 percent. In 2020 the total municipality population reached 251.
63.9 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 | 78 | 36.1 |
| Regular high school diploma | 54 | 25 |
| GED or alternative credential | 3 | 1.4 |
| Some college, less than 1 year | 10 | 4.6 |
| Some college, 1 or more years, no degree | 24 | 11.1 |
| Associate's degree | 19 | 8.8 |
| Bachelor's degree | 28 | 13 |
| Master's degree | 0 | 0 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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