This was 15.1 percent lower than the state average of 38 percent. In 2020 the total municipality population reached 655.
89.6 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Hardin for 2020*
| Degree | Number of people | Percentage of population | 
|---|---|---|
| No degree | 42 | 10.4 | 
| Regular high school diploma | 214 | 53.2 | 
| GED or alternative credential | 11 | 2.7 | 
| Some college, less than 1 year | 13 | 3.2 | 
| Some college, 1 or more years, no degree | 30 | 7.5 | 
| Associate's degree | 46 | 11.4 | 
| Bachelor's degree | 28 | 7 | 
| Master's degree | 18 | 4.5 | 
| Professional school degree | 0 | 0 | 
| Doctorate degree | 0 | 0 | 

 
               
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