Halaku may refer to:

• Hulagu Khan or Halaku Khan, Mongol ruler and grandson of Genghis Khan
• Halaku (film), a 1956 Hindi language film
• Halaku or Slayers, role-playing game characters from The Fallen
• Halaku, role-playing game character from The Forsaken

• Clacks (disambiguation)
• Clackson, James
• Clackson, Sarah
• Clackson, William
• Clacton by-election, 2014
• Clacton Cliffs and Foreshore
• Clacton Greyhound Stadium
• Clacton-on-Sea, England
• Clacton Servicing Depot
• Clacton Spear
• Cladactis costa
• Cladactis costae
• Cladactis mirabilis
• Cladara anguilineata
• Cladara atroliturata
• Cladara limitaria
• C. Ladd Prosser
• Clade X
• Cladiella elegantissima
• Cladistic Classification of Class Sarcopterygii
• Cladistic species
• Cladistic theory
• Cladium jamaicensis
• Cladium mariscus subsp. californicum
• Cladium mariscus subsp. intermedium