NV, nv or Nv may refer to:
- Science, medicine, technology and engineering
- Nv neuron, an artificial neuron
- Nv network, a term used in BEAM robotics
- Nitrogen-vacancy center, a color center in diamond
- nv (neutron flux), a unit of neutron flux equal to one thermal neutron per square centimeter per second
- Near vision, an acronym used in eyeglass prescriptions
- Other
- Nevada, a state in the United States of America
- Naamloze vennootschap (NV), a Dutch term for a public limited-liability company
- Navajo language, ISO 639-1 code nv
- Air Central NV, Japanese airline IATA code
- North Vista Secondary School, Singapore