ISMA can refer to:
- The Ikatan Siswazah Muslim Malaysia, a Malaysian NGO
- The Indian Summer Music Awards, a component of Indian Summer Festivals in Milwaukee, WI
- The Information Systems Management Architecture
- The International Securities Market Association
- The International Security Managers Association
- The International Stress Management Association
- The International Supermodified Association, a sanctioning body in modified racing
- The Internet Streaming Media Alliance
- The International Space Monkey Alliance, a grassroots organization.