This was 15.8 percent lower than the state average of 44.4 percent. In 2020 the total municipality population reached 5,599.
90.7 percent of the population had at least a high school diploma or the equivalent.
Degree distribution in Waimanalo for 2020*
| Degree | Number of people | Percentage of population |
|---|---|---|
| No degree | 309 | 9.3 |
| Regular high school diploma | 1,405 | 42.4 |
| GED or alternative credential | 119 | 3.6 |
| Some college, less than 1 year | 187 | 5.6 |
| Some college, 1 or more years, no degree | 344 | 10.4 |
| Associate's degree | 338 | 10.2 |
| Bachelor's degree | 385 | 11.6 |
| Master's degree | 181 | 5.5 |
| Professional school degree | 33 | 1 |
| Doctorate degree | 10 | 0.3 |

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