This was 17.5 percent lower than the state average of 43.2 percent. In 2020 the total municipality population reached 3,657.
83.6 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Fairbury for 2020*
| Degree | Number of people | Percentage of population | 
|---|---|---|
| No degree | 413 | 16.4 | 
| Regular high school diploma | 775 | 30.8 | 
| GED or alternative credential | 128 | 5.1 | 
| Some college, less than 1 year | 284 | 11.3 | 
| Some college, 1 or more years, no degree | 269 | 10.7 | 
| Associate's degree | 243 | 9.7 | 
| Bachelor's degree | 319 | 12.7 | 
| Master's degree | 55 | 2.2 | 
| Professional school degree | 29 | 1.2 | 
| Doctorate degree | 0 | 0 | 

 
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