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 Hoboken Housing Authority, the operator of public housing in Hoboken, New Jersey Holyoke Housing Authority, the operator of public housing in Holyoke, Massachusetts Houston Housing Authority, the operator of public housing in Houston, Texas