MHA
- Malaysian Highway Authority
- Malta Handball Association
- Mandan, Hidatsa, and Arikara Nation
- Manitoba Hockey Association
- Mast Head Amplifier
- Master of Health Administration
- Maximum holding airspeed
- May–Hegglin anomaly
- Member of the House of Assembly (disambiguation)
- Mental Health Act
- Methodist Homes for the Aged
- Microangiopathic hemolytic anemia
- Ministry of home affairs
- Mormon History Association
- Mueller–Hinton agar
- My Hero Academia