This was 38.5 percent higher than the state average of 42.7 percent. In 2020 the total municipality population reached 13,020.
96.9 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in San Marino city for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 286 | 3.1 |
| Regular high school diploma | 436 | 4.7 |
| GED or alternative credential | 74 | 0.8 |
| Some college, less than 1 year | 150 | 1.6 |
| Some college, 1 or more years, no degree | 809 | 8.7 |
| Associate's degree | 288 | 3.1 |
| Bachelor's degree | 3,753 | 40.1 |
| Master's degree | 1,914 | 20.5 |
| Professional school degree | 1,250 | 13.4 |
| Doctorate degree | 391 | 4.2 |
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