This was 27.4 percent lower than the state average of 41.1 percent. In 2020 the total municipality population reached 205.
87.7 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Coulter for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 18 | 12.3 |
| Regular high school diploma | 66 | 45.2 |
| GED or alternative credential | 4 | 2.7 |
| Some college, less than 1 year | 2 | 1.4 |
| Some college, 1 or more years, no degree | 36 | 24.7 |
| Associate's degree | 8 | 5.5 |
| Bachelor's degree | 10 | 6.8 |
| Master's degree | 1 | 0.7 |
| Professional school degree | 1 | 0.7 |
| Doctorate degree | 0 | 0 |

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