
Waipahu
- County:
- Honolulu County
- County Seat:
- No
- Area (mi²):
- 2.678
- State:
- Hawaii
Waipahu is a CDP located in Honolulu County, Hawaii. Waipahu has a 2025 population of 40,287. Waipahu is currently growing at a rate of 0.34% annually and its population has increased by 5.25% since the most recent census, which recorded a population of 38,276 in 2020.
The average household income in Waipahu is $126,625 with a poverty rate of 11.43%. The median age in Waipahu is 39.7 years: 36.7 years for males, and 43.1 years for females.