This was 3.3 percent lower than the state average of 44.4 percent. In 2020 the total municipality population reached 22,972.
91 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Kailua for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 1,480 | 9 |
| Regular high school diploma | 4,127 | 25.1 |
| GED or alternative credential | 317 | 1.9 |
| Some college, less than 1 year | 848 | 5.2 |
| Some college, 1 or more years, no degree | 2,902 | 17.7 |
| Associate's degree | 1,759 | 10.7 |
| Bachelor's degree | 3,099 | 18.9 |
| Master's degree | 1,343 | 8.2 |
| Professional school degree | 440 | 2.7 |
| Doctorate degree | 117 | 0.7 |
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