This was 9.7 percent lower than the state average of 28.9 percent. In 2020 the total municipality population reached 1,284.
77.8 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Addison (Webster Springs) for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 183 | 22.2 |
| Regular high school diploma | 248 | 30.1 |
| GED or alternative credential | 35 | 4.3 |
| Some college, less than 1 year | 118 | 14.3 |
| Some college, 1 or more years, no degree | 81 | 9.8 |
| Associate's degree | 65 | 7.9 |
| Bachelor's degree | 67 | 8.1 |
| Master's degree | 18 | 2.2 |
| Professional school degree | 8 | 1 |
| Doctorate degree | 0 | 0 |
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