N. K. Vishwanathan
- Birthday: 1941-04-23
- Deathday: 2017-03-25
- Place of birth: Chennai, Tamilnadu, India
- Also know as: N.K.Vishwanathan
N. K. Vishwanathan was an Indian film director and cinematographer who has worked on Tamil films. After beginning his career working as a cinematographer for Tamil films during the 1980s, he branched into film direction and made commercially successful films during the 1990s.
