HHA

HHA may refer to:


 * HHA Services, an American service company
 * Haji Husein Alireza & Co. Ltd., a Saudi Arabian trading company
 * Hallische Händel-Ausgabe, a collection of the works of George Frideric Handel
 * Hamburger Hochbahn, a transit operator in Hamburg, Germany
 * Hans Henrik Andreasen, Danish footballer and manager with the nickname HHA
 * Harrisburg Housing Authority, the operator of public housing in Harrisburg, Pennsylvania
 * Herbert Henry Asquith, former Prime Minister of the United Kingdom
 * Historic Hotels of America, an American hotel affiliation group
 * Historic Houses Association, a British organisation that represents privately owned historic properties
 * Houston Housing Authority, the operator of public housing in Houston, Texas