This was 17.8 percent lower than the state average of 31.4 percent. In 2020 the total municipality population reached 1,038.
58.1 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Grand Coteau for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 335 | 41.9 |
| Regular high school diploma | 294 | 36.8 |
| GED or alternative credential | 23 | 2.9 |
| Some college, less than 1 year | 7 | 0.9 |
| Some college, 1 or more years, no degree | 31 | 3.9 |
| Associate's degree | 17 | 2.1 |
| Bachelor's degree | 66 | 8.3 |
| Master's degree | 19 | 2.4 |
| Professional school degree | 1 | 0.1 |
| Doctorate degree | 6 | 0.8 |
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