This was 7.2 percent lower than the state average of 43.4 percent. In 2020 the total municipality population reached 12,316.
94 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 | 526 | 6 |
| Regular high school diploma | 1,654 | 18.8 |
| GED or alternative credential | 706 | 8 |
| Some college, less than 1 year | 889 | 10.1 |
| Some college, 1 or more years, no degree | 1,846 | 21 |
| Associate's degree | 856 | 9.7 |
| Bachelor's degree | 1,862 | 21.1 |
| Master's degree | 384 | 4.4 |
| Professional school degree | 77 | 0.9 |
| Doctorate degree | 8 | less than 0.1 |
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