Lahaina is the largest census-designated place in West Maui, Maui County, Hawaii, United States and includes the Kaanapali and Kapalua beach resorts. 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 Olowalu and to the CDP of Napili-Honokowai to the north. During the tourist season, the population can swell to nearly 40,000 people.