Kailua is a census-designated place (CDP) in Honolulu County, Hawaii, United States. It is 12 miles northeast of Honolulu - over Nu‘uanu Pali. The name is a contraction of two Hawaiian words and means "two seas".
The CDP's population during the 2000 census was 36,513. The CDP is primarily a residential community, with a centralized commercial district along Kailua Road.
Places of interest in Kailua include Kailua Beach Park, Lanikai Beach, Kawai Nui Marsh, and Marine Corps Base Hawaii.