This was 27.5 percent lower than the state average of 40.9 percent. In 2020 the total municipality population reached 1,275.
76.2 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Fort Thompson for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 153 | 23.8 |
| Regular high school diploma | 196 | 30.4 |
| GED or alternative credential | 72 | 11.2 |
| Some college, less than 1 year | 18 | 2.8 |
| Some college, 1 or more years, no degree | 119 | 18.5 |
| Associate's degree | 49 | 7.6 |
| Bachelor's degree | 32 | 5 |
| Master's degree | 2 | 0.3 |
| Professional school degree | 3 | 0.5 |
| Doctorate degree | 0 | 0 |
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