This was 22.2 percent lower than the state average of 38.9 percent. In 2020 the total municipality population reached 4,276.
68.8 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Mullins for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 849 | 31.2 |
| Regular high school diploma | 985 | 36.2 |
| GED or alternative credential | 104 | 3.8 |
| Some college, less than 1 year | 108 | 4 |
| Some college, 1 or more years, no degree | 219 | 8.1 |
| Associate's degree | 54 | 2 |
| Bachelor's degree | 315 | 11.6 |
| Master's degree | 70 | 2.6 |
| Professional school degree | 12 | 0.4 |
| Doctorate degree | 4 | 0.1 |
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