Houaïlou (French pronunciation: [wa.ilu]) is a commune in the North Province of New Caledonia, an overseas territory of France in the Pacific Ocean.

Service activities include the local administration and gendarmerie, schools, several small shops and other facilities.

Local Kanak tribes have traditionally operated a semi subsistence economy, with some waged labour, migrant income, and substantial cultivation.

Houaïlou's farmers produce Lychees, a fruit introduced by a colonist from Réunion, Jolimont Kabar.

There is a Fête du letchi each December, although production is unreliable in this climate and the festival is sometimes cancelled.