CWO may refer to:

• Cadet Warrant Officer, a cadet rank in the British Air Training Corps and the RAF Section of the Combined Cadet Force
• Cadmium tungstate, a scintillator
• Cash With Order, a standard UK commercial term
• Chief Warrant Officer, a non-commissioned rank in the Canadian military
• Chief Weather Officer
• Chief Web Officer, an executive who is in charge of the web presence for an organisation
• Communist Workers Organisation (disambiguation), one of several organisations
• Completion and Workover, a subsea operation performed on subsea well
• Conservative Women's Organisation, an organisation within the Conservative Party in the United Kingdom.
• Contingent Workforce Outsourcing
• Corrective Work Order, a penalty for littering in Singapore
• Chief Warrant Officer, a warrant officer in the United States military in the grade of W-2 or higher.

cWo (Carolina World Order )