This was 2.1 percent higher than the state average of 38 percent. In 2020 the total municipality population reached 4,260.
93.3 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Centralia for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 207 | 6.7 |
| Regular high school diploma | 784 | 25.5 |
| GED or alternative credential | 149 | 4.8 |
| Some college, less than 1 year | 394 | 12.8 |
| Some college, 1 or more years, no degree | 307 | 10 |
| Associate's degree | 311 | 10.1 |
| Bachelor's degree | 766 | 24.9 |
| Master's degree | 95 | 3.1 |
| Professional school degree | 44 | 1.4 |
| Doctorate degree | 16 | 0.5 |
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