This was 5.8 percent lower than the state average of 43.7 percent. In 2020 the total municipality population reached 1,271.
95.7 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Big Rock for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 39 | 4.3 |
| Regular high school diploma | 223 | 24.9 |
| GED or alternative credential | 29 | 3.2 |
| Some college, less than 1 year | 124 | 13.8 |
| Some college, 1 or more years, no degree | 142 | 15.8 |
| Associate's degree | 96 | 10.7 |
| Bachelor's degree | 159 | 17.7 |
| Master's degree | 82 | 9.1 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 3 | 0.3 |
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