This was 21.8 percent lower than the state average of 42.7 percent. In 2020 the total municipality population reached 2,015.
79.1 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Bethel Island CDP for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 314 | 20.9 |
| Regular high school diploma | 298 | 19.9 |
| GED or alternative credential | 48 | 3.2 |
| Some college, less than 1 year | 216 | 14.4 |
| Some college, 1 or more years, no degree | 309 | 20.6 |
| Associate's degree | 62 | 4.1 |
| Bachelor's degree | 171 | 11.4 |
| Master's degree | 81 | 5.4 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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