This was 12.7 percent higher than the state average of 38.1 percent. In 2020 the total municipality population reached 13,849.
92.6 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Seabrook for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 697 | 7.4 |
| Regular high school diploma | 976 | 10.4 |
| GED or alternative credential | 235 | 2.5 |
| Some college, less than 1 year | 671 | 7.1 |
| Some college, 1 or more years, no degree | 2,056 | 21.8 |
| Associate's degree | 1,145 | 12.1 |
| Bachelor's degree | 2,694 | 28.6 |
| Master's degree | 619 | 6.6 |
| Professional school degree | 179 | 1.9 |
| Doctorate degree | 152 | 1.6 |
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