Waimānalo () is a census-designated place (CDP) in the City & County of Honolulu, in the District of Koolaupoko on the island of Oahu, Hawaii, United States. This small windward community is located near the eastern end of the island. In the Hawaiian language Waimānalo means "potable water"; it is so named for the many brackish ponds in the area that were used for irrigation. As of the 2020 census, the CDP had a population of 6,057. About 1000 meters east of Waimānalo is the neighborhood of Waimānalo Beach. Waimānalo has a small commercial center along Kalanianaole Highway, but is separated from the shoreline and Waimānalo Beach (the longest stretch of sandy shoreline on Oahu) by Bellows Air Force Station. Waimānalo is noteworthy for its local flavor and large agricultural lots in the valley that extend back towards the Koolau from the center of town. Numerous plant nurseries are found in this area. There are no hotels in Waimānalo. Waimānalo is the site of Sea Life Park, located near Hawaii Kai on Kalanianaole Highway. The U.S. postal code for Waimānalo is 96795. Geography Waimānalo is located at . The nearest towns are Kailua to the west, and Waimānalo Beach to the east. Waimanalo Beach is located within the traditional Ahupuaa of Waimānalo. According to the United States Census Bureau, the CDP has a total area of , all of it land. Climate Demographics As of the census of 2000, there were 3,664 people, 849 households, and 751 families in the CDP. The population density was . There were 904 housing units at an average density of . The racial makeup of the CDP was 10.84% White, 0.16% Black or African American, 0.14% Native American, 26.80% Asian, 24.73% Pacific Islander, 0.33% from other races, and 37.01% from two or more races. 10.37% of the population were Hispanic or Latino of any race. There were 849 households, 38.9% had children under the age of 18 living with them, 59.4% were married couples living together, 21.0% had a female householder with no husband present, and 11.5% were non-families. 8.5% of households were one person, and 3.3% were one person aged 65 or older. The average household size was 4.31 and the average family size was 4.42. In the community the population was spread out, with 31.4% under the age of 18, 10.7% from 18 to 24, 28.8% from 25 to 44, 20.7% from