This was 50 percent higher than the state average of 43.7 percent. In 2020 the total municipality population reached 12,361.
99.1 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Winnetka for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 68 | 0.9 |
| Regular high school diploma | 83 | 1.1 |
| GED or alternative credential | 7 | less than 0.1 |
| Some college, less than 1 year | 24 | 0.3 |
| Some college, 1 or more years, no degree | 308 | 3.9 |
| Associate's degree | 166 | 2.1 |
| Bachelor's degree | 3,252 | 41.5 |
| Master's degree | 2,516 | 32.1 |
| Professional school degree | 1,094 | 14 |
| Doctorate degree | 310 | 4 |
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