This was 2 percent higher than the state average of 34.4 percent. In 2020 the total municipality population reached 163.
88.4 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Foss for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 15 | 11.6 |
| Regular high school diploma | 40 | 31 |
| GED or alternative credential | 4 | 3.1 |
| Some college, less than 1 year | 0 | 0 |
| Some college, 1 or more years, no degree | 23 | 17.8 |
| Associate's degree | 14 | 10.9 |
| Bachelor's degree | 22 | 17.1 |
| Master's degree | 11 | 8.5 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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