Kier may refer to:
Kier (industrial), a type of boiler or vat Kier Group, a business active in building and civil engineering Kier Eagan, the fictional founder of Lumon Industries in the Apple TV series Severance
People with the surname Avery Kier, American military officer David Kier, American government official Hiltrud Kier, Austrian art historian and academic Justin Kier, American basketball player Lemont Kier, American chemist and pharmacologist Olaf Kier, British businessman Samuel Kier, American inventor and businessman Udo Kier, German actor