This was 14.1 percent lower than the state average of 43.7 percent. In 2020 the total municipality population reached 71,857.
89.5 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Decatur for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 5,205 | 10.5 |
| Regular high school diploma | 14,187 | 28.6 |
| GED or alternative credential | 3,469 | 7 |
| Some college, less than 1 year | 4,169 | 8.4 |
| Some college, 1 or more years, no degree | 7,912 | 15.9 |
| Associate's degree | 4,048 | 8.2 |
| Bachelor's degree | 6,811 | 13.7 |
| Master's degree | 2,872 | 5.8 |
| Professional school degree | 592 | 1.2 |
| Doctorate degree | 401 | 0.8 |
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