Kailua
- County:
- Honolulu County
- County Seat:
- No
- Area (mi²):
- 13.797
- State:
- Hawaii
Kailua is a CDP located in Honolulu County, Hawaii. Kailua has a 2026 population of 9,870. Kailua is currently growing at a rate of 8.15% annually and its population has decreased by since the most recent census, which recorded a population of 0 in 2020.