CCNR could mean:
Central Catchment Nature Reserve, the largest nature reserve in Singapore Central Commission for Navigation on the Rhine China CNR, a national rail rolling stock manufacturer, before a merger created CRRC Center for Complex Network Research at Northeastern University Canadian Coalition for Nuclear Responsibility, see Anti-nuclear movement in Canada Coca-Cola and Nestle Refreshments, the previous name of Beverage Partners Worldwide Computable Cross Norm/Realignment (CCNR) Criterion in quantum physics