NNC

NNC can stand for:
 * Naga National Council, a predecessor of the Nationalist Socialist Council of Nagaland (NSCN)
 * Natal Native Contingent, British auxiliary soldiers in South Africa around late 19th century
 * National Nanotechnology Competition, of Iran
 * National Nutrition Council (Philippines)
 * National Negro Congress, Black liberation organisation in the United States
 * National Nuclear Center, of the Republic of Kazakhstan
 * National Nuclear Corporation (later officially just NNC), a company formed by the merger of companies that built the UK's nuclear power stations; bought by AMEC in 2005
 * National Numismatic Collection, a part of the National Museum of American History
 * neonatal care
 * neonatal cholestasis
 * neonatal conjunctivitis
 * neonatal cutting
 * Nepal Nursing Council
 * Nobel Night Cap, the student festivity at the end of the Nobel Prize week
 * North Northamptonshire Council, England
 * Northwest Nazarene College, now called Northwest Nazarene University, Idaho, United States
 * Norwegian Nobel Committee