This was 0.6 percent higher than the state average of 43.7 percent. In 2020 the total municipality population reached 5,825.
94.7 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Peoria Heights for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 224 | 5.3 |
| Regular high school diploma | 850 | 20.2 |
| GED or alternative credential | 194 | 4.6 |
| Some college, less than 1 year | 225 | 5.4 |
| Some college, 1 or more years, no degree | 847 | 20.2 |
| Associate's degree | 623 | 14.8 |
| Bachelor's degree | 763 | 18.2 |
| Master's degree | 289 | 6.9 |
| Professional school degree | 69 | 1.6 |
| Doctorate degree | 114 | 2.7 |

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