This was 22.4 percent lower than the state average of 43.7 percent. In 2020 the total municipality population reached 12,337.
83.4 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Streator for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 1,423 | 16.6 |
| Regular high school diploma | 2,761 | 32.3 |
| GED or alternative credential | 570 | 6.7 |
| Some college, less than 1 year | 785 | 9.2 |
| Some college, 1 or more years, no degree | 1,196 | 14 |
| Associate's degree | 604 | 7.1 |
| Bachelor's degree | 859 | 10 |
| Master's degree | 324 | 3.8 |
| Professional school degree | 26 | 0.3 |
| Doctorate degree | 6 | less than 0.1 |
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