MRA may refer to:
- Magnetic resonance angiography
- Mail retrieval agent
- Mandibular repositioning appliance or mandibular advancement splint for sleep apnea
- Marin Rowing Association
- Market Reduction Approach
- Marketing Research Association
- Massachusetts Rifle Association
- Men's rights advocate
- Metal Roofing Alliance
- Microcredit regulatory Authority
- Minimum reception altitude
- Moral Re-Armament
- Mountain Rescue Association
- Multiple regression analysis
- Multiresolution analysis
- Mutant registration acts (comics)
- Mutual recognition agreement or mutual recognition arrangement