| MESA | A Mine Electrical Standards Administration 
| Others |
| MESA | Magnetic Electric Source Analysis
| Others |
| MESA | Manufacturing Enterprise Solutions Association
| Others |
| MESA | Marine Education Society of Australasia
| Others |
| MESA | Marriott Employee Staff Association
| Others |
| MESA | Marshall Engineers and Scientists Association
| Others |
| MESA | Mason Enterprise Services Architecture
| Others |
| MESA | Math Engineering And Science Achievement
| Others |
| MESA | Math Engineering And Science Association
| Others |
| MESA | Math Engineering Science Achievement
| Others |
| MESA | Math, Engineering, and Science Acheivement
| Others |
| MESA | Math, Engineering, and Science Achievment
| Others |
| MESA | Mathematics Engineering and Science Achievement
| Others |
| MESA | Mathematics Engineering Science Academy
| Others |
| MESA | Mathematics Engineering Science Achievement
| Others |
| MESA | Mathematics Engineering Science and Achievement
| Others |
| MESA | Mathematics Engineering Science Association
| Others |
| MESA | Meals Entertainment Shopping and Activities
| Others |
| MESA | Measurement Evaluation Statistics and Assessment
| Others |
| MESA | Mechanical Engineering Students Association
| Others |
| MESA | Medical Education Support Association
| Others |
| MESA | Medical Equipment and Supplies Abroad
| Others |
| MESA | Medical Equipment Supplies Abroad
| Others |
| MESA | Medium Elevation Spray Application
| Others |
| MESA | Mens' Educational Support Association
| Others |
| MESA | Mesa Equine Sanctuary and Adoption
| Others |
| MESA | Meta Email Search Agent
| Others |
| MESA | Michigan Employment Security Act
| Others |
| MESA | Micro Epididymal Sperm Aspiration
| Others |
| MESA | Microscopic Epididymal Sperm Aspiration
| Others |
| MESA | Microsystems and Engineering Sciences Applications
| Others |
| MESA | Middle East Studies Association
| Others |
| MESA | Middle East Studies Association of North America
| Others |
| MESA | Million Equivalent Standard Axles
| Others |
| MESA | Miniature Electro-Static Accelerometer
| Others |
| MESA | Mining Enforcement and Safety Administration
| Others |
| MESA | Mobile Emergency and Safety Applications
| Others |
| MESA | Mobility for Emergency and Safety Applications
| Others |
| MESA | Model Experimental Systems Analysis
| Others |
| MESA | Modeling the Emergence of Shared Attention
| Others |
| MESA | Modular Energy Storage Architecture
| Others |
| MESA | Modular Equipment Storage Assembly
| Others |
| MESA | Modular Equipment Stowage Assembly
| Others |
| MESA | MOLLE Enhanced South African assault vest
| Others |
| MESA | Moving to end Sexual Assault
| Others |
| MESA | MSFC (Marshall Space Flight Center) Engineering Support Area
| Others |
| MESA | Multi Ethnic Study of Atherosclerosis
| Others |
| MESA | Multi-Role Electronically Scanned Array
| Others |
| MESA | Multinational Exchange for Sustainable Agriculture
| Others |
| MESA | Mutual Education Support And Advocacy
| Others |
| MESA | Mutual Education Support and Advocation
| Others |
| MESA | The Management And Economics Students Association
| Others |
| MESA | The Multi Ethnic Study Of Atherosclerosis
| Others |