Wailau is an isolated valley on the North Shore of the island of Molokai, Hawaii, United States. It can be reached only by boat (and only in the summer) or formerly by a hiking trail from the south coast of the island which is now overgrown and virtually impassable.
The valley was an ancient ahupuaa, and well populated until the 19th century, and contained many taro plantations. The valley is now unpopulated, although Molokai residents occasionally camp by the beach at the mouth of the valley in the summer.
- Wailau Valley Secrets, 2013
- Lloyd J. Soehren (2003). "A Catalog of Moloka'i Place Names". Retrieved 2014-02-04.
- "Kalaupapa Settlement Boundary Study. Along North Shore to Halawa Valley, Molokai". National Park Service. 2001. Retrieved 2014-01-29.
- Mary Kawena Pukui, Samuel Hoyt Elbert and Esther T. Mookini (2004). "lookup of Wailau ". in Place Names of Hawai'i. Ulukau, the Hawaiian Electronic Library, University of Hawaii Press. Retrieved November 12, 2010.