CNU could stand for:

University

  • Capital Normal University, Beijing, China
  • Cebu Normal University, Philippines
  • Chia Nan University of Pharmacy and Science, Tainan, Taiwan
  • Chonnam National University, Gwangju, South Korea
  • Christopher Newport University, Newport News, Virginia, US
  • Chungnam National University, Daejeon, South Korea

Police

  • Crisis Negotiation Unit, a special police unit for hostage, barricade, and suicide situations
  • FBI Crisis Negotiation Unit
  • Singapore Police Force Crisis Negotiation Unit

Others

  • Cameroonian National Union, later Cameroon People's Democratic Movement
  • Congress for the New Urbanism
  • CNU (singer) (born 1991), Korean