There are 17 US Post Offices in Maui County serving a total of 194,658 residents equating to 11,450 residents per post office. It's estimated that approximately 310,696 packages are handled across the 17 county post offices annually. Maui County, officially County of Maui, is a county located in the U.S. state of Hawaii. It consists of the islands of Maui, Lanai, Molokai (except for a portion of Molokai that comprises Kalawao County), Kahoolawe, and Molokini. The latter two islands are uninhabited. As of the 2010 census, the population was 154,834. The county seat is Wailuku. Maui County is included in the Kahului-Wailuku-Lahaina, HI Metropolitan Statistical Area."