• Cúa, a city outside of Caracas, Venezuela
• Cua, a form of Cai (surname), an ethnic Chinese surname.

CUA is a three letter acronym that can refer to:

• Catholic University of America
• Center for Ultracold Atoms, a division of the MIT Physics Department in conjunction with Harvard University
• China United Airlines
• The ICAO airline designator for China United Airlines
• Cost Utility Analysis
• Credit Union Atlantic, the largest credit union in Nova Scotia
• Credit Union Australia, Australia's largest credit union
• In information systems:
• Common User Access, a specification for user-computer interfaces, written by IBM
• Central User Administration of the SAP R/3 enterprise resource planning software
• Centera Universal Access, a software appliance produced by EMC Corporation, that provides access to its Centera product
• Certified Usability Analyst - a Certification administered by Human Factors International