This was 9.3 percent higher than the state average of 41.1 percent. In 2020 the total municipality population reached 1,463.
98.6 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Slater for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 14 | 1.4 |
| Regular high school diploma | 225 | 22.2 |
| GED or alternative credential | 23 | 2.3 |
| Some college, less than 1 year | 74 | 7.3 |
| Some college, 1 or more years, no degree | 166 | 16.4 |
| Associate's degree | 176 | 17.4 |
| Bachelor's degree | 241 | 23.8 |
| Master's degree | 53 | 5.2 |
| Professional school degree | 19 | 1.9 |
| Doctorate degree | 22 | 2.2 |

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