Killua may refer to:
Places Ireland Killua Castle, Clonmellon, County Westmeath Killua (civil parish), a civil parish in the barony of Delvin, County Westmeath Killua, County Westmeath, a townland in the barony of Delvin
Other Killua (singer), Albanian singer and songwriter Killua Zoldyck, a character from the manga series Hunter × Hunter by Yoshihiro Togashi