This was 16.3 percent lower than the state average of 37.7 percent. In 2020 the total municipality population reached 1,063.
78.3 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Rio Grande for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 65 | 21.7 |
| Regular high school diploma | 98 | 32.8 |
| GED or alternative credential | 3 | 1 |
| Some college, less than 1 year | 25 | 8.4 |
| Some college, 1 or more years, no degree | 44 | 14.7 |
| Associate's degree | 14 | 4.7 |
| Bachelor's degree | 36 | 12 |
| Master's degree | 4 | 1.3 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 10 | 3.3 |
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