This was 26.4 percent higher than the state average of 48.4 percent. In 2020 the total municipality population reached 671.
97.7 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Marine on St. Croix for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 12 | 2.3 |
| Regular high school diploma | 34 | 6.4 |
| GED or alternative credential | 10 | 1.9 |
| Some college, less than 1 year | 27 | 5.1 |
| Some college, 1 or more years, no degree | 51 | 9.6 |
| Associate's degree | 43 | 8.1 |
| Bachelor's degree | 200 | 37.6 |
| Master's degree | 95 | 17.9 |
| Professional school degree | 13 | 2.4 |
| Doctorate degree | 47 | 8.8 |
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