Lahaina is the largest census-designated place (CDP) in West Maui, Maui County, Hawaii, United States, and the gateway to the famous Ka'anapali and Kapalua beach resorts to its north. As of the 2010 census, the CDP had a resident population of 11,704. Lahaina encompasses the coast along Hawaii Route 30 from a tunnel at the south end, through Olawalu, and to the CDP of Napili-Honokowai to the north. During the tourist season, the population can swell to nearly 40,000 people.