- ACEO stands for Art Cards, Editions and Originals
- ACEO stands for Assistant Chief Electoral Officer (various locations)
- ACEO stands for Association of Chief Education Officers (UK)
- ACEO stands for Additional Chief Executive Officer (corporate title)
- ACEO stands for Association of Caribbean Electoral Organizations
- ACEO stands for Assistant Chief Education Officer (US NASA)
- ACEO stands for Assistant Chief Engineering Officer (Star Trek)
ACEO