This was 13.2 percent lower than the state average of 43.7 percent. In 2020 the total municipality population reached 2,534.
94.9 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Seneca for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 84 | 5.1 |
| Regular high school diploma | 505 | 30.6 |
| GED or alternative credential | 99 | 6 |
| Some college, less than 1 year | 172 | 10.4 |
| Some college, 1 or more years, no degree | 287 | 17.4 |
| Associate's degree | 254 | 15.4 |
| Bachelor's degree | 130 | 7.9 |
| Master's degree | 109 | 6.6 |
| Professional school degree | 4 | 0.2 |
| Doctorate degree | 7 | 0.4 |
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