MHA may refer to:
- Master of Health Administration, a degree awarded by many American, European and Australian universities
- Mast Head Amplifier, an amplifier (LNA) mounted as close as practical to the antenna
- May–Hegglin anomaly, a genetic disorder affecting the blood platelets
- Member of the House of Assembly
- Methodist Homes for the Aged, cares for older people and is part of MHA Care Group
- Minister for Home Affairs (India), a position in the Indian Cabinet, at both State and Union levels
- Minimum holding altitude, an aviation term, see holding)
- The Mormon History Association, a nonprofit organization promoting research and publication
- Mueller-Hinton agar, an agar of beef infusion, peptone, and starch used primarily for antibiotic susceptibility testing
- Malaysian Highway Authority, a government agency under the Malaysian Ministry of Works
- Malta Handball Association, the governing body of handball in Malta