HBA or hba may refer to:

Organizations

  • Hawaii Baptist Academy, United States, a private Christian school
  • Healthcare Businesswomen's Association, promotes involvement of women in healthcare
  • Hewa Bora Airways, defunct airline of DR Congo
  • Hirsch Bedner Associates, hospitality design company
  • Hospital Broadcasting Association, supports hospital radio in the United Kingdom
  • Home Builders Association, a local association federated in National Association of Home Builders, a trade association in the United States

Science and technology

  • Hemoglobin A (HbA)
  • Host bus adapter, computer network hardware
  • Horse blood agar, an agar plate
  • Human Biology Association

Other uses

  • Hamba language (ISO 639-3 code <code>hba</code>)
  • Highway Beautification Act
  • Hobart Airport (IATA code), Tasmania, Australia
  • Honours degrees in Canada: Honors Bachelor of Arts, or Honors Business Administration
  • Hood By Air, fashion brand
  • "HBA" (song)