This was 15.5 percent lower than the state average of 43.7 percent. In 2020 the total municipality population reached 777.
91.3 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Tonica for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 46 | 8.7 |
| Regular high school diploma | 158 | 29.9 |
| GED or alternative credential | 53 | 10 |
| Some college, less than 1 year | 46 | 8.7 |
| Some college, 1 or more years, no degree | 77 | 14.6 |
| Associate's degree | 59 | 11.2 |
| Bachelor's degree | 50 | 9.5 |
| Master's degree | 36 | 6.8 |
| Professional school degree | 1 | 0.2 |
| Doctorate degree | 3 | 0.6 |
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