AEF is a three-letter acronym which may refer to:
- Australasian Expeditionary Forces, Gaming Community
- Aboriginal Evangelical Fellowship, Australia
- Afrique Équatoriale Française or French Equatorial Africa
- Agricultural Industry Electronics Foundation
- Air Experience Flight
- Alameda Education Foundation
- American Eagle Foundation
- American Expeditionary Forces, in World War I
- Asia Education Foundation
- Asian Pacific American Bar Association Educational Fund
- Aviation Environment Federation