{{wiktionary|NCO}}
'''NCO''' may refer to:
* NCO Group, an international corporation * National Children's Orchestra of Great Britain * Net capital outflow, an economic metric * NetCDF Operators, software * Network-centric operations, a theory of war in the information age * Non-commissioned officer, a category of military rank * Numerically controlled oscillator, a digital signal generator * Nuova Camorra Organizzata, a defunct Italian criminal organization * Isocyanate, a functional group of atoms –N=C=O * Quonset State Airport, airport with this IATA code * Indian National Congress (Organisation), a former Political Party in India formally referred as NCO by the Election Commission of India. * Nevada–California–Oregon Railway, a defunct railway in the western United States
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