This was 21.3 percent higher than the state average of 40.5 percent. In 2020 the total municipality population reached 7,378.
98 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Sanibel for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 136 | 2 |
| Regular high school diploma | 1,380 | 20.3 |
| GED or alternative credential | 57 | 0.8 |
| Some college, less than 1 year | 208 | 3.1 |
| Some college, 1 or more years, no degree | 808 | 11.9 |
| Associate's degree | 394 | 5.8 |
| Bachelor's degree | 1,934 | 28.5 |
| Master's degree | 1,243 | 18.3 |
| Professional school degree | 369 | 5.4 |
| Doctorate degree | 256 | 3.8 |
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