This was 16.1 percent lower than the state average of 37.7 percent. In 2020 the total municipality population reached 1,501.
84.9 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in McArthur for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 155 | 15.1 |
| Regular high school diploma | 389 | 38 |
| GED or alternative credential | 46 | 4.5 |
| Some college, less than 1 year | 116 | 11.3 |
| Some college, 1 or more years, no degree | 97 | 9.5 |
| Associate's degree | 86 | 8.4 |
| Bachelor's degree | 81 | 7.9 |
| Master's degree | 50 | 4.9 |
| Professional school degree | 4 | 0.4 |
| Doctorate degree | 0 | 0 |
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