This was 5.5 percent higher than the state average of 38 percent. In 2020 the total municipality population reached 2,983.
93.8 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Byrnes Mill for 2020*
| Degree | Number of people | Percentage of population | 
|---|---|---|
| No degree | 127 | 6.2 | 
| Regular high school diploma | 432 | 21 | 
| GED or alternative credential | 113 | 5.5 | 
| Some college, less than 1 year | 181 | 8.8 | 
| Some college, 1 or more years, no degree | 311 | 15.1 | 
| Associate's degree | 274 | 13.3 | 
| Bachelor's degree | 460 | 22.3 | 
| Master's degree | 135 | 6.5 | 
| Professional school degree | 11 | 0.5 | 
| Doctorate degree | 18 | 0.9 | 

 
               
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