This was 5.6 percent lower than the state average of 43.2 percent. In 2020 the total municipality population reached 550.
89.5 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Cortland for 2020*
| Degree | Number of people | Percentage of population | 
|---|---|---|
| No degree | 38 | 10.5 | 
| Regular high school diploma | 91 | 25.1 | 
| GED or alternative credential | 17 | 4.7 | 
| Some college, less than 1 year | 29 | 8 | 
| Some college, 1 or more years, no degree | 51 | 14.1 | 
| Associate's degree | 87 | 24 | 
| Bachelor's degree | 36 | 9.9 | 
| Master's degree | 5 | 1.4 | 
| Professional school degree | 0 | 0 | 
| Doctorate degree | 8 | 2.2 | 

 
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