Ema may refer to:
- Ema (Shintō), wooden plaques with prayers or wishes at Shintō shrines and Buddhist temples
- Kemak people, also called Ema, an ethnic group in Timor
- Ema, the local name of the Greater Rhea (Rhea americana) in Brazil
EMA may refer to: In music:
- MTV Europe Music Awards, a set of music awards
- EMA (Slovenia), Slovenian Eurovision Song Contest selection
- Erika M. Anderson a singer/songwriter from America
In organizations:
- Early Medieval Alliance, a medieval reenactment group in the United Kingdom
- Eastern Military Academy, a defunct academy founded in 1944 in Connecticut
- Egmont Manga & Anime, a German manga publishing company
- Electronic Money Association, a trade body representing electronic money issuers in Europe
- Emergency Management Australia, an Australian Federal Government Agency
- Emmet Monument Association, a mid-nineteenth century New York group
- Energy Market Authority, a regulatory body in Singapore
- Entertainment Merchants Association, an international trade association
- Environmental Media Association, the organization awarding the Environmental Media Awards
- Environmental Media Awards, for the best television episode or film with an environmental message
- Ethiopian Mapping Authority
- Ethiopian Motor Association, a member of the Fédération Internationale de l'Automobile
- European Academy of Music Theatre (German: Europäische Musiktheater-Akademie)
- European Mahjong Association
- European Medicines Agency, a European agency for the evaluation of medicinal products
- Euro-Mediterranean Association for Cooperation and Development, a nonprofit organization based in Hamburg, Germany
In science and technology:
- Anti-Endomysial Antibodies test, a test for Coeliac Disease
- Effective Medium Approximations, a type of analytical model in materials science
- Epithelial membrane antigen, a protein
- Exponential moving average, a type of moving average in technical analysis
In transportation:
- East Midlands Airport, an English airport with IATA code EMA
In other areas:
- E.MA, European Master's Programme in Human Rights and Democratisation
- Education Maintenance Allowance, a financial scheme for British students