This was 15.6 percent lower than the state average of 48.4 percent. In 2020 the total municipality population reached 1,141.
93.9 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Atwater for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 40 | 6.1 |
| Regular high school diploma | 190 | 29 |
| GED or alternative credential | 36 | 5.5 |
| Some college, less than 1 year | 28 | 4.3 |
| Some college, 1 or more years, no degree | 147 | 22.4 |
| Associate's degree | 111 | 16.9 |
| Bachelor's degree | 87 | 13.3 |
| Master's degree | 14 | 2.1 |
| Professional school degree | 3 | 0.5 |
| Doctorate degree | 0 | 0 |

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