ACCU may refer to:
- Autodefensas Campesinas de Cordoba y Uraba, a Colombian paramilitary group
- Accu (battery), a battery that can be restored to full charge by the application of electrical energy
- ACCU (organisation), a software development user group
- Association of Catholic Colleges and Universities
- People's Choice Credit Union, formerly the Australian Central Credit Union
- Asia/Pacific Cultural Centre for UNESCO
- Aquarian Christine Church Universal, a religious movement founded by Levi Dowling
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