- ADEA stands for Age Discrimination in Employment Act of 1967
- ADEA stands for American Dental Education Association (Washington, DC)
- ADEA stands for Association for the Development of Education in Africa (RSA)
- ADEA stands for Automotive Dealership Excellence Award (est. 2009; India)
- ADEA stands for Army Development & Employment Agency
- ADEA stands for Army Developmental Employment Agency
- ADEA stands for Army Data Encyclopedia Administrator
ADEA