Wailuku is a census-designated place (CDP) in Maui County, Hawaiʻi, United States. The population was 12,296 at the 2000 census. It is the county seat of Maui County.
Wailuku is located just west of Kahului, at the mouth of the ʻĪao Valley. In the early 20th century Wailuku was the main tourist destination on Maui, though it has since been eclipsed with the rise of the resort towns such as Kaʻanapali, so much that there are no hotels to speak of in Wailuku.
Historic sites in the town include Kaʻahumanu Church (named after one of Hawaiʻi's great monarchs, Queen Kaʻahumanu) which dates to 1876, the Wailuku Civic Center Historic District, the site of the Chee Kung Tong Society Building, and the Bailey House, a 19th century former seminary and home that houses a history museum and the Maui Historical Society.