- AECO stands for Asociación de Empresas de la Construcción (Spanish construction association)
- AECO stands for Architecture, Engineering, Construction and Operations (built environment professions)
- AECO stands for Association of Arctic Expedition Cruise Operators (est. 2003)
- AECO stands for Alberta Energy Company (Canada)
- AECO stands for Academic Exchange and Collaboration Office (Hong Kong)
- AECO stands for Accredited Elevator/Escalator Certification Organization
- AECO stands for Aeromedical Evacuation Control Officer
- AECO stands for Advance Engineering Change Order
- AECO stands for Architecture, Engineering, Construction and Owner-operated
AECO