Ecma or ECMA may refer to:
- Ecma International, an international standards organization for Information Communication Technology and Consumer Electronics
- Engineering College Magazines Associated, a group of student-run engineering-based publications
- East Coast Music Awards, an annual awards ceremony for music appreciation on the east coast of Canada
- East Coast Music Association, a non-profit association that hosts the East Coast Music Awards
- European Carton Makers Association
- European Castor and wheel Manufacturer's Association