This was 19.1 percent lower than the state average of 46.3 percent. In 2020 the total municipality population reached 318.
91.2 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Smithville Flats for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 21 | 8.8 |
| Regular high school diploma | 113 | 47.3 |
| GED or alternative credential | 8 | 3.3 |
| Some college, less than 1 year | 13 | 5.4 |
| Some college, 1 or more years, no degree | 19 | 7.9 |
| Associate's degree | 20 | 8.4 |
| Bachelor's degree | 21 | 8.8 |
| Master's degree | 24 | 10 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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