This was 24.9 percent lower than the state average of 41.8 percent. In 2020 the total municipality population reached 644.
88.6 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Merrillan for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 47 | 11.4 |
| Regular high school diploma | 133 | 32.1 |
| GED or alternative credential | 28 | 6.8 |
| Some college, less than 1 year | 48 | 11.6 |
| Some college, 1 or more years, no degree | 88 | 21.3 |
| Associate's degree | 26 | 6.3 |
| Bachelor's degree | 19 | 4.6 |
| Master's degree | 22 | 5.3 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 3 | 0.7 |
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