This was 23.3 percent lower than the state average of 44.8 percent. In 2020 the total municipality population reached 262.
92.4 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Gladstone for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 12 | 7.6 |
| Regular high school diploma | 75 | 47.5 |
| GED or alternative credential | 11 | 7 |
| Some college, less than 1 year | 3 | 1.9 |
| Some college, 1 or more years, no degree | 23 | 14.6 |
| Associate's degree | 18 | 11.4 |
| Bachelor's degree | 8 | 5.1 |
| Master's degree | 8 | 5.1 |
| Professional school degree | 0 | 0 |
| Doctorate degree | 0 | 0 |
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