Haa District (Dzongkha: ཧཱ་; Wylie: Haa; alternative spellings include "Ha") is one of the 20 dzongkhag or districts comprising Bhutan. Per the 2005 census, the population of Haa dzongkhag was 11,648, making it the second least populated dzongkhag in Bhutan after Gasa. The dominant language of the district is Dzongkha, the national language.